Workshop Receipts ...

acid alcohol allowed ammonia apparatus arbor balance spring barrel bath boiling bottom bromide brush cannon pinion centre chloride citric acid clean clock coating cod liver oil collodion colour condenser cool copper cover cylinder diameter dissolved distilled edge emulsion evaporation film filter finished flat gelatine glaire glass glue gold hammer heat hole iron latter leather liquid material menstruum metal minutes mixed morocco mould necessary negative ordinary pallet paper passing percolator piece pinion pipe pivot placed plate Potassium bromide powder prints pump pyro Pyrogallic acid quantity removed round rubbed rubber salt screw sheet side silver bromide silver nitrate soda solution spring steam straw sufficient sulphate sulphuric acid surface temperature thick thin tion tube turn valve vapour varnish vellum vessel washed weight wheel wire