466 BOTANICAL GAZETTE [DECEMBER 
enough credit to a translator to acknowledge his full share in such a work as this, 
a share that is most burdensome, and too little appreciated as a rule. Englis 
and American readers are certainly most grateful to Professors BALFouR and 
Groom for making accessible not only this new ecological treatise, but the other 
great ecological masterpiece as well, Scummper’s Plant geography.—H. C. 
COWLES 
Pharmakognostischer Atlas.—Kocu> has followed his Mikroskopische 
Analyse der Drogenpulver with a second part for the use of apothecaries, whole- 
sale druggists, sanitary officials, students of pharmacy, etc. In the arrangement 
of the text the author has followed his old scheme of different types, numerals, 
and indentations for greater facility in locating the various histological structures. 
and detailed descriptions of the individual tissues. Excellent plates of trans- 
verse and longitudinal sections serve to make these descriptions remarkably 
clear. The first Lieferung is devoted to cascarilla, red cinchona, and cinnamon 
barks. The complete work will certainly be useful in the recognition of crude 
drugs.—K. G. BARBER. 
Methods in microscopy.—The second edition of the Praktikum of Mosrus* 
has about the same scope as the first. Directions are given for making prepara- 
tions and also for some study of the preparations. Only the simplest methods are 
given, no attention being paid to the paraffin method or to critical methods of 
staining; in fact, most of the directions, in American schools, would be given 
orally or would be written on the blackboard for elementary classes which have 
no need as yet for any complicated technic. Of the 123 pages, 92 are devoted to 
spermatophytes, 6 to pteridophytes, 5 to bryophytes, and 20 to thallophytes. 
—CHARLES J. CHAMBERLAIN, 
NOTES FOR STUDENTS 
Genetics.—In the fourth report to the Evolution Committee of the Royal 
Society, BATESON, SAUNDERS, and PUNNETTS present an account of their further 
studies with poultry, sweet peas, and stocks. Valuable summaries are gt 
all the studies that have been made on these subjects, the most interesting a 
being the further evidence of the occurrence of such ratios as 7:1:1:7 and 15:1+1: 
15. It is suggested that the types of gametic coupling evident in cases of this 
kind might explain the occurrence of certain aberrant forms which are generally 
‘looked upon as mutants. The term “spurious allelomorphism” is proposed 
yen of 
3 Kocx, Lupwic, Pharmakognostischer Atlas. I, Die Rinden. I Bd. 1 Lief. 
pp. 26. pls. 5. Leipzig: Gebriider Borntraeger. 1909. M 3.59. - 
Mostus, Martin, Botanisch-mikroskopisches Praktikum fiir Anfanget. Seco 
4 
edition. 8vo. pp. ii+123. Berlin: Gebriider Borntraeger. 1909. M3-20 
5 BaTEson, W., SAUNDERS, Miss E. R., AND Punnett, R. C., es gies 
studies in the physiology of heredity, Reports to the Evolution Committee of 
Royal Society 4: 1-40. 1908. : 
