The Batch Book

The batch book was in the bottom drawer of the workbench in the storeroom, beneath three boxes of cobalt oxide, behind a broken thermocouple that Enzo had replaced in 2011 and had not discarded because Enzo did not discard things that had once worked, that had once measured, that had once been part of the furnace's system of knowledge and control.

Chiara found it on a Saturday afternoon, two weeks after the funeral, while she was reorganizing the storeroom for the first time in years, for the first time since Enzo had organized it, since Enzo's system of storage had been the system and no other system had been necessary because Enzo's system worked, was logical, was the arrangement of a man who had spent forty-six years accumulating materials and who had placed each material in a location that made sense to him and that made sense to Chiara because Chiara had learned the system the way she had learned the formula, by proximity, by imitation, by the thirty years of entering the storeroom and finding the cobalt where Enzo kept the cobalt and the copper where Enzo kept the copper and the chromium where Enzo kept the chromium, the 0.3 percent.

She moved the cobalt boxes. She moved the broken thermocouple. And there, at the bottom of the drawer, was a notebook.

It was black, clothbound, A5 size, the cover worn to a softness that suggested decades of handling, the spine cracked and recracked and the pages swollen with the moisture of the fornace, the humidity that pervaded everything, that warped the wood and rusted the steel and, apparently, swelled the paper of a notebook that had been kept in a drawer for longer than Chiara could estimate. The cover bore no label. The cover said nothing. The cover was as reticent as the man who had written in it.

She opened it.

The first page was dated 12 marzo 1978. The handwriting was Enzo's -- she recognized it immediately, the small, precise letters, the engineer's hand, the hand that wrote numbers the way it shaped glass, with economy and clarity and a total absence of decoration. The page contained a batch recipe:

Silica: 70% Soda ash: 15% Limestone: 10% Potash: 3% Borax: 2%

Below the recipe, a note: First batch as maestro. Temperature at 1210. Viscosity good. Color clear with slight yellow tint -- reduce iron content in next batch. The crucible has a crack on the north side, upper third. Monitor.

She turned the page. Another date, another recipe, another note. And another. And another. The pages accumulated, the dates advancing, the handwriting consistent, the notation precise, the book a diary of the furnace's chemistry, a daily record of the batch compositions that Enzo had mixed and melted and gathered and shaped over forty-six years.

She sat on the floor of the storeroom with the book in her lap and she read.

The book was not organized the way a book was organized. It was not chronological in the simple sense -- the dates did not proceed in order, did not advance from one page to the next in the sequence of days. Instead, the book was organized by formula. Each formula -- clear, verde Venier, cobalt blue, lattimo white, the amber that Enzo had developed for a commission in 1993, the deep red that used gold chloride and that was so expensive to produce that Enzo had made it only three times in his career -- each formula had its own section, its own pages, its own history. The sections were separated by tabs -- small pieces of cardboard, hand-cut, labeled in Enzo's writing, the tabs dividing the book into compartments the way the storeroom was divided into shelves, each compartment containing its own knowledge, its own accumulation, its own forty-six years.

She turned to the verde Venier section.

The first entry was dated 5 giugno 1978. Three months after Enzo became maestro. Three months after the first batch. The entry read:

Verde Venier, first mixing. Father's formula. Copper oxide 2.1%, iron oxide 0.8%, chromium oxide 0.3%. Batch weight 15 kg. Temperature 1220. First gather at 6:15 AM. Color: green. The green of the lagoon at Burano in June, the shallow water over white sand. The green I have seen my whole life. The green that is ours.

She read this entry and she sat on the floor and she did not move for a long time. She sat with the book open on her lap and the words before her eyes and the storeroom around her and the furnace beyond the wall, roaring, always roaring, and she read the words again -- the green that is ours -- and the words were Enzo's voice, were the voice she would not hear again, the voice that had spoken to her every day for thirty years, the voice that had said gather and steady and five seconds and the green that is ours, the voice that was now only on paper, only in this book, only in the handwriting that was as precise and as permanent as the glass it described.

She read on. The verde Venier section spanned forty pages. Forty pages of formulas, adjustments, observations, the history of a color told in the language of chemistry. The entries tracked the evolution of the verde Venier green over forty-six years -- the slight adjustments that Enzo had made, the corrections, the refinements, the way the formula had changed and not changed, had been modified and preserved, had been the same formula and a different formula simultaneously, the way a person was the same person at twenty and at seventy and was also a different person, the continuity and the change coexisting, the identity persisting through the modification.

1983: Increased chromium to 0.35%. Too dark. The lagoon is not this dark. Returned to 0.3%.

1987: New supplier for copper oxide, Degussa rather than the Padova man. The color shifted -- warmer, more yellow. The Degussa copper has a different particle size, melts at a different rate, distributes differently in the batch. Returned to Padova supplier.

1991: Chiara asked why 0.3% and not 0.4%. I told her: because 0.3 is the lagoon and 0.4 is the forest. She did not ask again. She understood.

Chiara stopped reading. She closed the book. She opened it again and read the entry again. 1991. She had been twenty-nine. She had been working in the furnace for fifteen years, since she was fourteen, since Enzo had taken her to the bocca and shown her the heat and the glass and the pipe and the rotation and the breath and the color and the formula and the life. She had been twenty-nine and she had asked why 0.3 and Enzo had answered and she remembered the answer -- she remembered it in her body, in the place where the formula lived, the place below language -- but she did not remember asking the question. She did not remember the moment. The moment had been unremarkable to her, had been one of ten thousand moments at the furnace, one question among ten thousand questions, and it had passed and she had not remembered it.

Enzo had remembered. Enzo had written it down. Enzo had opened this book and turned to the verde Venier section and dated an entry 1991 and recorded the question and the answer as though the exchange were as important as the formula itself, as though the teaching were as worth preserving as the chemistry, as though the human transaction -- the asking and the answering, the apprentice and the maestro, the niece and the uncle -- were data, were part of the batch, were an ingredient in the verde Venier green as essential as the chromium.

She continued reading.

1994: Chiara mixed the verde Venier for the first time today. She weighed the chromium on the analytical balance. Her hands were steady. The batch was correct. The color was correct. The green was the green. I did not need to adjust. The formula has been transmitted.

1997: The furnace was rebuilt. New refractory brick, new crucible, new floor. The first verde Venier batch in the new crucible produced a green that was slightly different -- cooler, bluer, the new brick leaching minerals into the glass. The difference was visible to me. I do not think it was visible to anyone else. I adjusted: reduced copper by 0.05%, increased iron by 0.02%. The green returned. The new crucible will stabilize in six months. The adjustment is temporary.

2003: Chiara made the Biennale piece today. The large bowl, the one for the exhibition. The verde Venier in that piece is the best verde Venier I have seen. Better than mine. The green is deeper, the saturation higher, the transparency cleaner. She has surpassed the formula. The formula is the floor. She has found the ceiling. I did not tell her this. I should have told her this.

Chiara read this entry three times. She read it the way she read the glass -- looking for the surface meaning and the deeper meaning, the said and the unsaid, the written word and the space around the written word that held what the word could not. I did not tell her this. I should have told her this. The sentence was the pontil mark of the entry. The sentence was the scar, the rough place, the evidence of a connection that had existed and that had not been expressed and that was now, thirteen years after the Biennale and two weeks after the funeral, being expressed in a notebook in a storeroom in a fornace on an island in a lagoon that was the color of the glass that was the subject of the sentence that contained the words he should have said and did not.

She continued.

2008: My cough is worse. I do not tell Chiara. The doctor says silicosis. The doctor says stop working. I do not stop working. The work is the breathing. Without the work the breathing is just breathing -- mechanical, purposeless, the lungs performing their function without their function meaning anything. At the furnace the breathing means something. At the furnace the breathing becomes glass.

2014: I have begun teaching Chiara the things I have not yet taught her. The things I assumed she would learn by watching, by proximity, by the osmosis that the furnace permitted. I was wrong to assume. Some things must be said. The batch adjustments for the new crucible. The relationship between humidity and viscosity. The way the glass behaves differently in winter, when the air is drier, when the gather cools faster, when the working time is shorter by eight seconds that matter. These things I assumed she knew because I knew them. She did not know them. She knows them now. The saying was necessary. The saying was late.

2019: The acqua alta. The water came into the furnace. The refractory brick stayed dry -- Chiara and Marco sandbagged it. I was at home. I could not come. I could not come to the furnace because the distance between my apartment and the furnace is three streets and three streets was too far, the lungs could not carry me three streets, the oxygen concentrator does not travel, the machine that breathes for me is plugged into the wall and the wall is in my apartment and my apartment is not the furnace. Chiara saved the furnace. I lay in bed and listened to the sirens and counted the tones and imagined the water on the floor and the sandbags at the base and Chiara's hands placing the bags and Marco's hands placing the bags and the furnace surviving because the people survived, because the tradition survived, because the human effort that the tradition required was still being made by humans who cared enough to wade through a flooded island at four in the morning to protect a box of fire from a sheet of water.

2021: Chiara came today. She told me about the chandelier -- the Contessa's chandelier, forty-seven arms, verde Venier and cobalt. She described the column. She described the filigrana in the finial. She described the way the pendants caught the light. She did not describe the way her hands moved when she described these things -- the hands that shaped the air while the mouth shaped the words, the hands that could not stop shaping, that shaped even in the absence of glass, the hands that were the tradition in motion, the tradition that I put in her hands and that her hands hold and will continue to hold after my hands are still.

This was the last verde Venier entry. The page after it was blank. The blankness was the silence, the end of the voice, the cessation of the hand that had written forty pages about a color and a formula and a tradition and a niece and a furnace and a life.

Chiara closed the book. She held it in her lap. She sat on the floor of the storeroom and held the book the way she held a finished piece of glass -- carefully, with both hands, the weight distributed, the object supported, the fragile thing protected by the grip that was firm enough to hold and gentle enough not to crush.

She should show this to Giulia. The thought arrived the way thoughts about Giulia always arrived -- not as a decision but as a recognition, the recognition that the tradition required transmission, that the knowledge in the book was not Chiara's knowledge to keep but the furnace's knowledge to share, that the book was not a diary but a textbook, not a memoir but a manual, the forty-six years of one man's attention to the chemistry of glass recorded in a form that another person could read and learn from and be changed by.

But the book was also private. The book was also the interior of a man who had been, in all his exterior life, as reticent as the cover of the notebook -- unlabeled, unmarked, the contents hidden behind a surface that said nothing. The entries about the formula were data, were chemistry, were the shareable knowledge of the craft. But the entries about Chiara -- the question about 0.3 percent, the Biennale piece, the hands that shaped the air -- these were not data. These were the other knowledge, the knowledge that was not about glass but about people, not about chemistry but about love, the love that Enzo had expressed in the only form the furnace permitted, which was precision, which was attention, which was the daily recording of the things he noticed and the things he felt and the things he should have said and did not.

She would show Giulia the formulas. She would show Giulia the batch adjustments, the humidity observations, the crucible notes, the technical knowledge that the book contained and that Giulia needed. She would show Giulia the parts of the book that were instruction.

She would not show Giulia the parts that were love. Those she would keep. Those were the pontil marks that she would not grind away, the rough places in the book that she would hold privately, that she would carry in her body the way she carried the formula, below language, below discussion, in the silence that was not empty but full, in the place where the green lived, in the place where Enzo lived now that Enzo lived only in the things he had made and the things he had written and the things he had taught and the people he had changed.

She stood. She put the book on the workbench. She would bring it home tonight. She would read the rest of it -- the clear glass section, the cobalt section, the lattimo section, the amber, the red. She would read every entry, every date, every note, every observation. She would read the voice that was no longer a voice but that persisted in the handwriting the way the verde Venier green persisted in the glass, permanently, irrevocably, the ink on the paper as durable as the color in the crucible.

She returned to the furnace. The team was there -- Marco at the pontil rack, arranging the rods by length, the way he always arranged them, the precise organization that was his version of Enzo's storeroom system, the servente's order. Paolo at the soffietta station, coiling the hose, his movements unhurried, the quiet man performing the quiet task. Tomaso sweeping, always sweeping, the garzone's eternal contribution, the floor that was never clean and that was always being cleaned. Giulia at the marver, practicing rolls, the empty pipe on the steel surface, the rotation, the endless rotation that would one day become the rotation with glass, the rotation that meant.

Chiara looked at them and she thought about the batch book and she thought about the entries that recorded the furnace not as a place but as a community, not as a building but as a collection of people who performed their functions the way the ingredients of the batch performed their functions -- the silica providing structure, the soda providing flux, the limestone providing stability, the cobalt providing color -- each person an ingredient, each person contributing a property that the whole required, that the glass required, the glass that was not made by a single person but by a team, by a system, by a furnace that was both a machine and a family.

She went to the bench. She sat. She took a pipe.

"Giulia," she said. "Come here."

Giulia came. She stood beside the bench, her hands at her sides, her posture the attentive posture of the apprentice, the body ready, the mind ready, the readiness that was the first thing the furnace taught and the last thing the furnace required.

"In the storeroom," Chiara said, "in the bottom drawer of the workbench, beneath the cobalt boxes, there is a notebook. It is Enzo's. It contains forty-six years of batch formulas and adjustments and observations about the glass. You will read it. You will read the technical entries. You will learn what he learned about the relationship between humidity and viscosity, about the behavior of the crucible in its first year, about the way the glass changes with the seasons. You will read it because the knowledge in the book is the knowledge that I cannot teach you by showing, that I cannot transmit by proximity, that must be read because it was written by a man who understood that some things must be said and that the saying was necessary and was late."

Giulia nodded.

"You will not read everything," Chiara said. "Some pages are marked with a fold at the corner. You will skip those pages. Those pages are not for you. Not yet."

Giulia nodded again. She did not ask what was on the folded pages. She did not need to ask. She understood, with the understanding that the furnace had been teaching her for three months, that some knowledge was shared and some knowledge was held, that the tradition was both the public formula and the private mark, the chemistry that was transmitted and the feeling that was kept, the verde Venier green that belonged to everyone and the green that is ours that belonged to the family.

Chiara had not yet folded any pages. She would fold them tonight, at home, reading the book, marking the entries that were instruction and the entries that were love, separating the teachable from the personal the way she separated the cullet on Sunday mornings, the clear in one pile and the verde Venier in another, the shared material and the private color, the glass that could be remelted and the glass that could not.

She stood from the bench. She walked to the furnace. She opened the bocca. The heat met her face and the heat was the same heat and the day was a different day and the book was in the storeroom and the book held the voice and the voice said the things it should have said and the things it did not say and the things it wrote instead of saying, and the writing was enough, was the glass, was the verde Venier green of the communication that persisted after the communicator was gone, the words on the page as permanent as the color in the glass, the batch book as durable as the batch, the record surviving the recorder the way the piece survived the maker, the way the glass survived the breath.

She gathered. The verde Venier came onto the pipe. Green. Luminous. The green that was theirs. The green that was now in the book and in the body and in the glass, the three forms of persistence, the three ways the formula continued, the paper and the flesh and the silica, the written and the remembered and the made, the three threads of the filigrana that was the tradition, twisting through the clear glass of the years, visible, permanent, verde Venier green.