544 EXPERIMENT STATION RECORD. 



suddenly germinated. No evidence was secured as to the cause of this delayed 

 germination. The germination showed no marl^ed response to variations of 

 temperature within the vital limits, but saturation with water appears to be 

 essential for the best results. The germination of the seed and the growth of 

 the seedling proceed most rapidly when in direct contact with air. Light exerts 

 no appreciable influence. The seeds gei'minate and grow most rapidly in soils 

 with relatively little water-soluble salts. 



On the preparation of German East African plantation rubber. A. Zimmer- 

 MANN {Pflanzcr, (i (1910), \o. 8. oik 113-1 IS). — Owing to the low prices re- 

 ceived for the average plantation rublK'r of German East Africa, exi>erimenis 

 are being carried on to work out better methods of coagulating tlie latex and 

 preparing the rubber. Some results are here given of an experiment conducted 

 to produce rubber with a permanent clear color. Thus far Purnb, muriatic acid, 

 nitric acid, and oxalic acid used in coagulating the rubber have all given some- 

 what favorable results in preventing the formation of coloring matter after the 

 rubber has dried. The exjieriments are to be continued. 



On the preparation of rubber (Funtumia elastica), and on its future in 

 the Ivory Coast, A. Ciii-v.m.ikr (.l.'/r. I'rnt. I'.iiis CIkiuiIs. ]0 (I'JIO). .Yo. ,SJ, 

 pp. 189-201). — This is a report of a survey of the rubber industry in the various 

 regions of the Ivory Coast, including the details of exploitation, native methods 

 employed in coagulating the rubber, suggestions for improvement thereon, and 

 a discussion relative to the future of rubber in the Ivory Coast. 



Lumber saved by using^ odd lengths (17. 8. Dcpt. Agr., Forest Serv. Circ. 

 180, pp. 5). — In 1909 a number of the leading lumber manufacturers of the 

 Pacific coast put into effect resolutions previously adopt«'d by the National 

 Lumber Manufacturers' Association relative to the manufacture of odd lengths 

 of flooring, ceiling, drop and bevel siding, finish, partition, and molding. This 

 circular embraces the results of an investigation to determine the effect this 

 step might have in saving waste in lumber manufacture. 



Under conditions prevailing upon the Pacific Coast, it is estimated that the 

 making of odd lengths will increase the output of the different classes of prod- 

 ucts by 2.07 per cent. An inquiry in the j-ellow pine region, covering both short 

 and long leaf yellow pine lumber, suggests that a similar saving can be effected 

 in the South. 



Tabular data are given showing the waste due to even-length manufacture, 

 possible saving by trimming to odd lengths, j)ercentage of boards possible to 

 manufacture to odd lengths, and i)ercentage of odd lengths used in various 

 building oi^erations. 



DISEASES OF PLANTS. 



A brief handbook of the diseases of cultivated plants in Ohio, A. D. Selby 

 (Ohio Sta. Bui 211,. pp. 301 -.',.56 -{-V II, figs. 105).— The first section of this bul- 

 letin, which is a revision of Bulletin 121 (E. S. R., 13. p. 155), is devoted to a 

 general discussion of plant diseases, parasitic fungi, symbiosis, cultural methods, 

 enzymatic diseases, soil-infesting parasites, soil and seed treatment, wound 

 infection, and remedies for plant diseases, including formulas and methods of 

 application of the standard fungicides. 



The second section treats of the diseases of Ohio plants arranged alpha- 

 betically according to hosts. 



An extended bibliograiihy is appended. 



A calendar for plant protection. L. IIiltner (Pflanzcnschutz nach Monaten 

 geordnet. Stuttgart, 1909. pp. riI+J,33, figs. 138).— This is a guide to the 

 monthly precautions to be taken to protect economic plants against fungus, 



