Mr J. Young, 
Mr Young m the Preparation of Poppy OU. 19 
London^ January 1819. 
To Tlios. Davy, Son & Mends. 
For expences on 86 lb. Sem. Pap. alb. received from him for 
pressing, producing 
lb of oil, Sem. pap. alb. 
43 lb. cake. 
Viz. Bottle for oil, 3s. 8d. 1 L 0 7 8 
Proportion of expences up, 4s. j ' 
Pressing 86 lb. at 19s. - - - - 0 14 7 
Hamper, 2s. 6d. Shipping, Is. - - ” 0 3 6 
L.l 5 
From this account there appears to have been a loss of 11 lb. 
of the weight. But it is evident the proportion of loss would be 
much less when conducted upon a large scale ; and had the seed 
been more recently collected, the proportion of oil would have 
been much greater. 
Should the oil of superior quality answer the description given 
of it, and be more palatable than the olive oil in common use, 
12s. per gallon may perhaps be too low an estimate. Salad oil 
is at present sold at 2s. 6d. or 3s. per English pint. 
Art. V . — Account of a new Style of Pngramng on Copper in 
Alto Relievo^ invented by W. Lizars. ^Drawn up from in- 
formation communicated by the Inventor. 
The progress which has been made during the last thirty 
years, in the Mechanical Arts, and in the application of Science 
to the useful purposes of life, has been no less remarkable for 
its rapidity, than for the variety and importance of the inven- 
tions by which it has been marked. The history of the Fine 
Arts during the same period, though it does not present us with 
any very splendid achievements, has yet to record some striking 
specimens of their advancement. One of the most important of 
these, is undoubtedly the invention of Lithography ; an art by 
which copies of drawings of all kinds can be multiplied with such 
a degree of accuracy and facility, as to be a complete substitute 
B 2 
