1856. ] BOTANICAL GAZETTE. 277 
low organisms, and the means are at command, it is doubtless best to send to 
Berlin! for the equipment. But for many who have not large bank accounts, 
and who are still desirous of learning or teaching something concerning bac- 
— a few lines about inexpensive, home-made apparatus may prove accept- 
able. 
The necessities are; (a) A good microscope, of which nothing further need 
be said, (b) a dry sterilizer, (c) a steam sterilizer, (d) a water oven or incubator, 
(e) moist chambers, (/) test-tubes, (g) inoculating needles, (h) soft glass tubing, 
(j) pincers. 
The dry sterilizer may be made of sheet-iron (“ Russia” prefers}, and 
if the walls are double all the better; but the common ovens sold with “oil” 
stoves may be easiest procured, and answer every purpose. The side door is in 
Steam Sterilizer. a, Fig. 2 . Incubator. a, Double pe for water 
ee és ae b, prote: ecting space ; 6, age with collar to serve for the 
ring of tin outside th he felt cover: insertion of thermometer and for handle: ej 
¢, felt govesine dle at felt covering on c ; d, nose piece for filling 
extreme top of lower ruses: ater space, observing height of en and for 
thermometer or gas- regulator ; mine in 
every way preferable to a cover at the top. The bottom should be PaaS 
to admit the flame and a false bottom pierced with small holes, except near the 
central area, placed an inch above. Several moveable shelves are pacing 
must depend upon the amount of work to be done, but in any case 0 
square foot for the base is little enough, and a greater height is preferable. 
this ull vessels and utensils which will stand a high temperature, as well as 
‘quantity of cotton-wool for plugs, are to be sterilized by heating to 150° C., or 
more. It is a good place to keep a supply o 
Keep a quantity of cotton in the upper space. Let this be separated into pel- 
lets big enough for plugs before sterilizing. 
ilizer (fig. 1) is a very useful vessel for sterilizing fluids in 
flasks, test-tubes, etc., and ndage tl that will not —. a » high dry sli 
ra 
the like. It should be cyltndicien! in graye not less tha 
ter of base and one foot in height. It should be divided into two equal parts, 
1 Or to Eimer and Amend, 205-211, Third Ave., N. Y- City.—Eps. 
