82 



as compared with whole milk, has been assumed to be in the ratio of 

 3.1 to 4. On this basis, Avhen whole milk is worth 3 cents per quart 

 skim milk would be worth 2.33 cents. On the basis of 4.33 cents per 

 pound of digestible nitrogenous substances and of fat, and .9 cent 

 for nonnitrogenous substances, the feeding value of the skim milk 

 used in these experiments would be 1.91 cents per gallon. Creamei-y 

 buttermilk, containing from 7 to 8 per cent of solids, has been pur- 

 chased by the Station at 1.37 cents per gallon (see Third Annual 

 Report Massachusetts State Station, p. 4'2). On this basis the skim 

 milk produced at the Station would be worth 1.75 cents per gallon. 



Commercial fertilizers, C. A. Goessmaxn, Ph. D. (pp. 14-1()). — 

 This includes a record of analyses and the trade yalues of fertilizing 

 ingredients for 18S9. 



Hatch Experiment Station of the Massachusetts Agricultural College. 



Dvimiiiiiciit of flie MdSsacliii'fcSt-^ At/riciiUnnil CoUrgr. 



Location. Amherst. Director. Henry H. (jooilell. M. A. 



BULLETIN No. 3. .JANUARY. 1889. 



Tuberculosis, C. H. Ferxald, Ph. D. (pp. 3-20). — This bulletin is 

 a compilation prej^ared " at the request of the director in response to 

 the many demands from all over the State for information on the 

 subject." 



The subject is treated under the following cuptions: (1) Animals 

 attacked by tuberculosis. (2) History of tul)erculosis. (3) Distri- 

 bution of tuberculosis. (4) Is human tuberculosis contagious? (5) 

 Is boyine tuberculosis contagious? (G) Is human tuberculosis com- 

 municable to lower animals? (7) Is boyine tuberculosis communi- 

 cable to man? (8) Are human and boyine tuberculosis identical? 

 (9) Is boyine- tuberculosis hereditary ? (10) What are the symptoms 

 of boyine tuberculosis? (11) Is boyine tuberculosis curable? (12) 

 "\^niat measures should be taken to ayoid the contagion? 

 BULLETIN No. 4, APRIL, 1889. 



DiyisiON or PIorticilture, S. T. Maynard, B. S. (pp. 3-22). 



Experiments in Iteafing greenhotises; steam vs. hot water (pp. 

 3-7). — In order to test the comparatiye economy of heating with 

 steam and with hot water " two houses were constructed, 75 by 18 

 feet, as nearly alike as possible in eyery particular. Two boilers of 

 the same pattern and make were put in, one fitted for steam and one 

 for hot water. Records of the temperature of each house were made 

 at 7.30 and 9 a. m. and 3, 6, and 9 p. m." during January and Febru- 

 ary, together with the amount of coal consumed. The results of the 

 experiments, given in tables, show that nearly 20 per cent less coal 

 w^as consumed with hot water than with steam, while the tempera- 

 ture ayeraged 1.7 degrees higher and was more eyen. Definite con- 

 clusions can only be drawn after the further tests which the Station 

 hopes to make. 



