44 



SCIENCE 



[N. S. Vol. LII. No. 1332 



meal, 208; and for that receiving ootton-aeed meal, 

 55. On reversing the rations in the cottonseed- 

 tankage and eotton-seed pens, the egg production 

 was reversed, showing that the difference in pro- 

 duction depended on the ration. All pens received 

 oyster shell, grit and charcoal. 



The seed corn situation in KentucTcy : W. D. Yai- 

 LEAU, Kentucky Experiment Station. Investiga- 

 tions carried on at the Kentucky Experiment Sta- 

 tion indicate that practically all seed corn in the 

 corn belt is infected with Fusarium moniliforme 

 Sheldon, and that this organism is capable of caus- 

 ing a root and stalk rot of corn. Infection on an 

 ear appears not to be localized. Slightly infected 

 seed may show no signs of infection, if grown 

 only for a period of seven or eight days. Eeddish 

 discolorations developing in the seed coats during 

 germination are an indication of infection. Seed 

 studied was obtained from Kentucky, Georgia, 

 Mississippi, Tennessee, Kansas, Arkansas, Mis- 

 souri and Minnesota. 



Veterinary science : W. W. Dimock, Kentucky Ex- 

 periment Station. The author stressed the pressing 

 necessity for research upon the nature and causes 

 of diseases in live stock. He showed that the fu- 

 ture of animal industry depended upon the con- 

 trol of animal diseases and that control can be se- 

 cured only after the cause is known. He cited as 

 an example the need for exact knowledge of the 

 life histories of the internal parasites known as 

 nematodes and showed how extensive are their 

 ravages in horses. He believes that here, in their 

 life history and in their effect on the host, is a 

 field holding great promise to the investigator. 

 , Notes on the rapid analysis of magnesian lime- 

 stone: S. D. AVERITT, Kentucky Experiment Sta- 

 tion. A differential method for the analysis of rel- 

 atively pure magnesian limestone, without an actual 

 determination of either Ca or Mg, which is quite 

 rapid and sufficiently accurate for agricultural 

 and most other purposes, is described. Determi- 

 nations to be made are, A, neutralizing power of 

 the limestone against N/2HC1, expressed as CaCOs ; 

 B, weight of insoluble matter + NIt,OH precipi- 

 tate, from the same portion. Then 



100 — B = % OaCOj + MgOOa, 

 and 

 , 5.35 ( A — (100 — B) ) = % MgCOs. 



, Notes on light and light pressure: C. C. Krp- 

 LiNGEB, Mt. Union College, Alliance, Ohio. Some 

 evidence is presented indicating that mass is not 

 a universal property of light and certain photo- 



chemical absorption experiments are described 

 which show no measurable increase in weight of the 

 reagents, following the action of light. 



Experiments with lime, acid phosphate and soil 

 fungicides on land infested vnth root-rot disease of 

 tobacco: G. C. Eoutt, Central Experimental Earm, 

 Ottawa, Canada. Experiments are described look- 

 ing to the possible control of the root-rot disease 

 by applications of lime, acid phosphate, mixtures 

 of lime and sulfur, dilute sulfuric acid, land 

 plaster, copper sulfate, potassium polysulfid, gas 

 lime, ferrous sulfate and formaldehyde. Acid 

 phosphate seemed to be very beneficial in some in- 

 stances, as did sulfuric acid, but the majority of 

 the experiments gave negative results. The author 

 concludes that the disease can not be controlled in 

 this way. 



Flant growth: G. D. Buckner, Kentucky Ex- 

 periment Station. Comparative study was made of 

 the translocation of the ash, phosphorus, calcium 

 and magnesium from the cotyledons of germinat- 

 ing garden beans, Phaseolus vulgaris, when grown 

 in distilled water culture and in garden soil. In 

 the distilled water culture 55 per cent, of the 

 original ash, 57 per cent, of the phosphorus, 25 per 

 cent, of the calcium and 59 per cent, of the mag- 

 nsium was translocated to the seedling, while, in 

 the seedlings grown in garden soO, 91 per cent, of 

 the ash, 92 per cent, of the phosphorus, 78 per cent, 

 of the calcium and 83 per cent, of the magnesium 

 was utilized by the seedling. The abnormal con- 

 dition caused by the distilled water culture is 

 shown and that less calcium than any of the other 

 elements studied was removed from the cotyledons 

 by the growing seedling is suggestive of its insol- 

 uble form in the cotyledons and its structural func- 

 tion. 



Alfred M. Petee, 

 . Secretary 



SCIENCE 



A Weekly Journal devoted to the AdvEuicement of 

 Science, publishing the official notices and pro- 

 ceedings of the American AssociadoQ for 

 the Advancement of Science 



Published every Friday by 



THE SCIENCE PRESS 



LANCASTER. PA. GARRISON. N. Y. 



NEW YORK. N. Y. 



Entered in the poet-affice at Lancuter, Pa.» a« lecond d«B matter 



