1902] MICROSCOPICAL JOURNAL. 79 
dealing with small-pox epidemics even to replacing vacci- 
nation ? 
In the discussion over Dr. Friedrich’s paper, Dr. Thomas 
related vaccinating 70 Asylum children with glycerinated 
vaccine and not acase took. A second lot of vaccine took, 
in every case, and there were no septic arms, or other 
troubles. This proves that vaccination skillfully attended 
to is not what pessimists have taught the public to believe. 
But a loud outcry ought to be raised against certain manu- 
facturers, and doctors must not pay for goods until they 
have tested and proved them. All who are interested in 
this matter will do well to send 20 cents for the February 
number of the CLEVELAND MeEpicat JourRNAL which devotes 
12 pages to a report of the subject. 
BIOLOGICAL NOTES. 
By L. H. PAMMEL. 
AGRICULTURAL BACTERIOLOGY.—A study of the relation 
of bacteria to agriculture with special reference to the 
bacteria in the soil, in water, in the dairy, in miscellane- 
ous farm products and in plants and domestic animals. 
H. W. Conn, vi, 412 40 figs. P. Blakiston’s Son & Co, 
Philadelphia, 1901, $2.50. 
It is gratifying that an American author has published 
a work that will greatly aid in setting aside the erroneous 
impression among laity and physicians that the bacteria 
are all injurious. The author has treated in a compre- 
hensive manner the use of bacteria in the arts and in- 
dustries. Bacteria are important in many problems con- 
nected with the farm, such as dairying, the subject of ni- 
trification, the appropriation of nitrogen by leguminous 
plants, the disposal of sewage and the problems connect- 
ed with it, such fermentations as vinegar, sauerkraut, the 
curing of tobacco. The author has given up-to-date in- 
formation on the chemical ferments or enzymes, so little 
understood. Excellent illustrations accompany the book 
and the lucid style makes it admirable for students. 
