James Watt’s Laboratory Notebook – page 1

Fill a Vial one third of Copal broken into small pieces, add as much Oil of Spike Lavender as will fill the Vial sett it in a gentle heat for 3 or 4 days Q.D.E. Melius.

Then take another Vial put into it as much of the Gelatinous mass formed by the Spike and Copal as will fill it about ¼ then add oil of Turpentine till the Vial is full sett it in a gentle heat for 6 or 7 days & pour of the clear for use.  J Pringle Esquire: This does not appear to be a perfect solution of Copal as there remain[s] a Quantity of a Mucilaginous stuff at the bottom of the Vial that will not Dissolve either in oil of spike or turpentine however long digested, it is also very slow in Drying unless in an oven & even when…  

[continued on page 2]