66 



REPORT 1869. 



Diagram illustrating tte curves of average monthly mean quantities of Atmo- 

 spheric Ozone, and of the comparative prevalence of Epidemic Cholera during 

 four years' registration in the Eomhay Presidency. 



1865-64. 



1864-65. 



1865-66. 



1866-67. 



~. t- 





wb 





i £ V a a h ' 



II ri^. . ^1|1l§N. ..Iilsll'i-g^.. 



i^S ^c.^l'S.' 



g B i g = >-- d , 



i £.? d'5> 



S— "i. 



O S fi 3 £ S? 



bg >^ 



m 



o 





* Thick line. Ozone-curve showing monthly variations of ozone. 

 Dotted line. Curve showing relative prevalence of epidemic cholera. 

 Thin line. Showing prevalence of north-easterly winds. 



rent, and the prevalence of epidemic cholera, or of that materies morhi in the air 

 which brings about the epidemic condition. 



The returns for the years 1863 and 1864 give many illustrations of the coincidence 

 of low ozone readings, t. e. readings below the average of the particular months or 

 relatively lower than those of the preceding weeks, and the occurrence of epide- 

 mic cholera ; several instances of this were given in detail. 



Although in many of them the presence of the epidemic was marked by an almost 

 total absence of ozone, as indicated by the test-paper, in the majority of cases it 

 was a relative deficiency that was most apparent, a decrease of ozone numbers below 

 the level of the normal quantities of those particular periods. 



The depression of the ozone-curves during these two years of epidemic cholera, 

 as compared with the curve of the following years, is more decidedly marked if we 

 consider it in reference to the mean-level line aflbrded by the results of the four 

 years' registration. 



In the year 1864 the numbers of stations in which this condition was present, 

 from the "m )nth of February to the month of July inclusive, were consecutively 

 1, 3, 4, 6, 3, 2, thus amounting in the month of May'to 6 out of the fifteen stations ; 

 while in the following year the numbers rose to nine-tenths, in the month of Jime, 

 of the whole number of stations imder review. 



The cone formed by the ozone-ciu-ve of this year was thus seen to be proportion- 

 ately small, extending only tlrrough part of June, July, and August in breadth, 

 and to the level of 46 in height; while that of the following year, in which there 

 was little or no epidemic cholera prevalent, extends from May to October in 

 breadth and to 6-2 in height. 



On the Amount of Soluble and Insoluhle Pliosphutes in J] heat-Seed. 

 By Professor P. Ckace-Calveet, F.RS. 



The author said that the result of various experiments he had made was that 

 100 parts of cotton-fibre yield, when repeatedly washed with water, a quantity of 

 acid phosphate of magnesia. Both husks and seeds also yield certain proportions, 

 and these results show that the phosphates exist in much larger quantity in the 

 seed than in the other parts of the pod. Experiments upon wheat-flour of various 



