JOTiRNAL OF ^J'Tll'^. ROYAL TlOHTlOri/niRAli S0Cll<7rV. 



Heat in Respiration. By (leorge. J. rcirco {Bot. Owz, 

 pp. 89-112, Feb. 1912; 8 figs.).— The aiii.hor found that peas in 

 germination lost 4.93 calories per diem per gram of peas. Certain 

 other experiments seem to show that the heat given out by peas under 

 these circumstances decreases with their age. A mouse enclosed in a 

 Dewar flask lost in half an hour's imprisonment 11.19 calories per 

 minute, but no loss of heat could be detected in the case of two 

 salamanders even in twenty-four hours. 



This liberation of heat must be regarded as an "end product," 

 a waste and not an essential product. The essential product may be 

 energy. Heat loss is an unessential though an inevitable feature of 

 respiration. — G. F. S. E. 



Hemiboea, The Genus. By Prof. Dr. H. Solereder {Beih. Bot. 

 Cent. Bd. 29, Aht. ii. Heft 1, pp. 117-126; 7 figs.).~The author after 

 anatomical investigation of the leaves, &c., of the various species con- 

 siders that the genus may remain next to the Oesneraceae. 



G. F. S. F. 



Heterostylous Plants, Observations on. By N. E. Stevens 

 (Bot. Gaz. pp. 277-308, April 1912; 3 pi.).— The author found a great 

 difference in the rate of development of the pollen tube in Buckwheat 

 when legitimately and when illegitimately fertihzed. In eighteen hours 

 after legitimate pollination a proembryo was found, whilst" in seventy- 

 two hours after illegitimate pollination the pollen tubes had not reached 

 the egg. Under natural conditions, therefore, there would be very 

 little chance of illegitimate pollination resulting in fertilization. 



The paper is for the most part a description of the cytology and 

 embryology of Buckwheat and Houstonia coerulea. 



The chromosomes in the anaphase of the reduction division are 

 twice as great in the short-styled form. In the long-styled form also 

 the central chromosome is considerably larger in one daughter nucleus 

 than its synaptic mate in the sister nucleus. The author compares 

 this to the supposed sex determinant in certain insects. — G. F. S. E. 



Hickory, Manufacture and Utilization of, 1911. By Charles 



F. Hatch (U.S.A. Dep. Agr., Forest Service, Circ. 187; Nov. 16, 

 1911). — In the Ohio and Mississippi Valleys Hickory occurs in greatest 

 abundance and reaches its largest size. There are ten species of 

 Hickory, all of which produce timber that is more or less valuable in 

 the making of vehicles and tool handles. It is stated that no foreign 

 country, except a little of Southern Canada, yields Hickory, and no 

 foreign country has been successful in its cultivation. — A. D. W. 



Hippeastrum procerum. By W. W. (Gard. Chron. p. 73; 

 July 27 ; col. plate and fig.). — A concise account of the discovery, 

 names, appearance, and cultivation of the so-called Blue Amaryllis. 



E. A. B. 



Hot Water for Retarded Flowering-. By T. Boucard (Le Jard. 

 XXV. 593, p. 332, Nov. 5, 1911).— Finding that his Chrysan- 



