378 EXPEKIMENT STATION EECOED. 



probably inherited. It is suggested that the characters segregated during 

 segmentation may in some way be identified with the enzyms in the germ cell. 



The relation of nucleoli to chromosomes, H. E. Jordan (Arch. Zellforsch., 5 

 (1910), No. 3, pp. 39^-405, figs. 9). — In studies of Echinoderms the author finds 

 that the chromotin substance of chromosomes appears to arise from the 

 nucleolus by a process of budding and dispersing. Evidence obtained by other 

 observers is also cited which does not support the hypothesis of the morphologi- 

 cal individuality of the chromosome. 



The process of fertilization and other cytolog'ical problems, B. Nemec {Das 

 FroNem der Befruchtungsrorgdnge und andere Zytologische Fragen. Berlin, 

 1910, pp. 532, pis. 5, figs. 119). — Among the many problems connected with 

 nuclear union and division treated in this book are the following: Micro- 

 chemistry of the nucleus, effect of chloroform, plasmolysis, and other factors on 

 nuclear and cell division, individuality of the chromosomes, relation between 

 the nucleus and size of the cell, chromosome reduction, and the nucleus as the 

 carrier of the idioplasm. In the transmission of characters from cell to cell 

 and from generation to generation, the author ascribes less influence to the 

 nucleus than do many other investigators. 



An extensive bibliography is appended. 



Three examples of duplicity in chick embryos with a case of ovum in ovo, 

 C. H. O'DoNOGHUE {AnaU Anz., 37 (1910), N-o. 20, pp. 530-536, figs. .',).— Two 

 cases of syncephalie monsters, one a case of independent embryos in the same 

 egg, and a case of an egg within an egg, are illustrated and described. The 

 literature I'elating to similar cases is cited. 



[The anatomy of the sex organs of hermaphrodites] (Nature [London}, 85 

 (1910), No. 2140, p. 19). — A note on some ancient museum specimens of the sex 

 organs of cattle and poultry. 



Live stock and farming' fifty years ago (Live Rtock Jour. [London], 70 

 (1909). No. 186-',, pp. 671. 672; 71 (1910), Nos. 1867, pp. 31, 32; 1868, p. 55).— 

 An account of the live stock industry gleaned from visits to Scotland, the Cots- 

 wold Hills, and Suffolk and Essex counties, in the early sixties. 



Cooperative live stock insurance, E. A. Stopford (Jour. Ed. Agr. [London], 

 17 (1910), No. 8, pp. 6.'i3-6Jf9). — A summary of the principles on which coopera- 

 tive live stock insurance in the continental countries of Europe is organized. 



Safety and comfort of stock in transportation (Breeder's Gaz., 58 (1910), 

 No. 21, pp. 1079, 1080, figs. 3). — A discussion of the causes of shrinkage in live 

 stock transportation. A new type of live stock car, which has many humani- 

 tarian features, is illustrated and described. 



Regulations governing the certification of recognized breeds and pure 

 bred animals (U. S. Dept. Agr., Bur. Anim. Indus. Order 175, pp. 6). — These 

 regulations apply to animals imported into the United States for breeding pur- 

 poses. There is also a list of recognized breeds and books of record in Canada 

 and Europe. 



Live stock commercial literature, C. S. Plumb (Breeder's Gas., 58 (1910), 

 No. 22, pp. 1136, 1137). — A discussion of the live stock sale catalogue, in which 

 it is pointed out that if the pedigrees and other data which these catalogues 

 contain should be accurately compiled they would serve as valuable reference 

 books for breeders to keep on file. 



Factors concerned in the acclimatization of European animals in Algeria 

 and warm countries (Bui. Agr. Algerie et Tunisie, 16 (1910), No. 17, jrp. 413- 

 41 8). — A brief accouut of the buffalo, zebu, and French breeds of cattle which 

 have been introduced into Algeria. 



The essential factors in the acclimatization of European live stock at 

 Tonkin, E. Douakche (Agr. Prat. Pays Chauds, 10 (1910), No. 91, pp. 271- 



