642 EXPERIMENT STATION RECORD. [Vol.35 



Tobacco from Cyprus {Bui. Imp. Inst. [80. Kensington], IS (1915), No. 4, pp. 

 547-550 ) .—An article describing a number of samples of Turkish tobacco grown 

 in Cyprus, and giving in this connection the chemical composition of two of the 

 samples. 



It is pointed out that some of the samples conform with Turkish tobacco as 

 regards size of leaf but that they contain too much moisture for the English 

 market. It is stated that the excess of moisture caused a rapid secondary fer- 

 mentioned in the tobacco resulting in dark patches around the midrib. 



Frost and wheat, A. H. Cockayne (Jour. Agr. [Neio Zeal.], 12 (1916), No. 1, 

 pp. 1-10, figs. 7). — This article discusses the fertilization of wheat in its rela- 

 tion to frost injury and reports observations made on the effects of a late frost 

 in New Zealand. 



In nearly every case the wheat crops which failed to become fertilized as the 

 result of frost injury were autumn sown. It is pointed out that this was not 

 because of the time of sowing but because the crops happened to be in a critical 

 stage when the frost injury occurred. The wheat crops fully fertilized at the 

 time of the frost and whose flowers had closed again were not damaged at all, 

 while spring sown wheat not yet developed to the stage of fertilization was 

 injured more or less where the frost was most severe. These spring sown 

 crops did not show the complete lack of fertilization seen in those that were 

 on the point of flowering when the frost occurred. 



Second annual seed laboratory report, 1914-15, W. L. Oswald {Minnesota 

 Sta. Bui. 159 {1916), pp. 3-16, figs. 4).— During the year 8,452 samples were 

 sent in for examination and 125 official samples were collected. The results of 

 purity and germination tests are given in tables. 



The use of a sunlight germinator in testing grass and flower seeds gave 

 promising results. It was found that many of the grass seeds germinate best 

 in the light. An experiment in testing the germination of seeds in soil and 

 sand in the greenhouse as compared with the chamber tests in the laboratory 

 showed that in nearly every case the laboratory test gave a somewhat higher 

 percentage of germination than was secured in the soil test in the greenhouse. 



Weeds and their identification, E, Atkinson {Jour. Agr. [New Zeal.], 12 

 (1916), No. 1, pp. 32-39, figs. 9). — Descriptive notes are given on capeweed 

 iCryptostemma calendulaceum) , hawkweed {Crepis capillaris), and hawkbit 

 (Leontodon hirtus), as they occur under New Zealand conditions. 



HORTICULTURE. 



Plant propagation, M. G. Kains (New York: Orange Judd Co., 1916, pp. 

 XIX +322, figs. 214). — In the present manual and textbook the author has 

 aimed to bring together the latest information on all branches of practical and 

 theoretical plant propagation with the view of making the work valuable both 

 to the professional propagator and to the teacher of plant propagation. 



The successive chapters deal with the following subjects: Germination; 

 germination and longevity of seeds; seed testing; potting; propagation by 

 buds — layerage ; bottom heat ; cuttage ; classes of cuttings ; graftage — gen ^ral 

 considerations ; is graftage devitalizing ; Daniel's experiments and conclusions ; 

 general points concerning fruit tree stocks ; stock and scion handling ; grafting 

 waxes, wound dressings, etc.; methods of grafting; methods of budding; 

 nursery management; laws affecting nursery stock; and suggested practicums. 



Plant propagation in the Tropics, P. J. Wester {Philippine Bur. Agr. Bui. 

 S2 (1916) pp. 87, pis. 12, figs. 40). — In this bulletin the author first discusses 

 the principles and methods of plant propagation with special reference to their 

 application in the Tropics. Directions are then given for the vegetative prota- 



