134 THE AMERICAN MONTHLY ~—— {Jun 
The materia] should be placed in a bottle of 90 per 
cent alcohol for three or four days before cutting, and 
when the operation is in progress, a cup should be pro- 
vided to receive the razor also containing 90 per cent 
alcohol, a saucer with the same spirit in it to dip the 
material in, and another to receive the sections. A sable- 
hair brush will also be required of the size known as 
crow-quill ; camel-hair brushes being useless. 
The material should be held vertically between the 
thumb and index finger of the left hand, allowing it to 
rest in the first bend of the finger and keeping the thumb 
+ inch below the level of the finger. The upper end of 
the material to be cut should be about level with the 
finger, the razor being held lightly but firmly, chiefly 
with the thumb and index finger of the right hand. Well 
wet the material and razor with the alcohol, place the 
blade of the razor flat upon the index finger of the left 
hand and cutting from heel to point, or by pushing the 
razor away from you and cutting from point to heel. As 
each section is cut, it should be lightly brushed from the 
razor into the saucer of alcohol, and when, say, one hun- 
dred sections have been made, the thinnest and best haif 
dozen may be selected and the process repeated for prac- 
tice. A further selection of the best may then be made. 
Knowledge, London, Eng. 
ee 
MISCELLANEOUS. 
JAS, H. STEBBINS,Jr., Microscopist, 80 Madison av., New 
York city. Photo-micrographs, lantern slides, sections, 
slides, etc. Pathological examinations, sputum, urine, etc. 
The Popular Science Monthly for May. J. A. Fleming 
explains the important advantages which have entirely 
altered our ideas of the structure of matter, of electricity 
and of the ether. 
OBJECTIVE.—W, Wray, Laurel House, Highg makes 
an objective adjustable from 2 ’’to 4.” 
LST ~l 
