12 
health are now undertaking to supply the apparatus 
and culture media needed for diphtheria work, so as 
to reduce the practitioner’s part to the minimum of 
manual manipulation. The preparation and examin- 
ation of slides offers little difficulty to the medical 
student who is already equipped with a knowledge of 
work. Here, as in pharmaceutic botany, the reference 
to authentic descriptions and authentic material be- 
mes more and more necessary in proportion as one 
mo 
and more free the routine of bot xamina- 
tion, so the exhaustive study of the etiology of any 
germ disease is passing more and more from the phy- 
sician to the medical bacteriologist who specializes in 
cian is obliged to make. The difference is in degree, 
however, rather than in kind. 
