66 THE BOOK OF FRUIT BOTTLING 
Celery 100 |b. will yield 44 Ib. 
Onions - ne 10 to 12 lb. 
REPORT ON EXPERIMENTS IN FrRuIT & VEGETABLE 
DryING, AT THE EXPERIMENTAL GARDEN, DroiT- 
WICH, I9Q0I. (Reprinted by permission from 
‘‘Gardening for All,” by James Udale, Hort. 
Instructor to Worc. C.C.) 
I have, during the months of September and October, 
carried out certain experiments in drying fruit, vege- 
tables, and herbs, by means of a Number O (Dr 
Ryder’s Patent) Invicta Evaporator, supplied by Messrs 
Lumley & Co., The Minories, London, E.C. Twenty 
trays were supplied with it, and the catalogue price is 
£11, 10s., plus an advance of Io per cent. 
This Evaporator is, in my opinion, too small for com- 
mercial purposes ; because it requires as much attention 
—and in respect to the regulation of temperature, more 
care—as one with three or four times its capacity. It 
is also very wasteful with fuel; because the Evaporator 
consists of only one short flue or air-chamber, through 
which the hot air rushes immediately into the atmo- 
sphere and is lost. For those two reasons the cost of 
labour and fuel is unnecessarily great, and the cost of 
the dried article much higher than it would be with an 
Evaporator of larger capacity. 
In conducting the experiments I sought to ascertain 
(1) the best varieties for drying for commercial purposes. 
(2) The average time required to dry the respective 
varieties at known average temperatures. (3) The 
average loss in weight between the undried and the 
dried article. (4) The average consumption of fuel 
during 24 hours of continuous work; and (5) the 
