L42 



Dr. W. J. S. Lockyer. 



[Jan. 16, 



Fig, 2.— White Blood Corpuscles digested with heated serum and culture of the 

 Bacillus typhosus for 15 minutes at 37° C. Shows that the micro- 

 organisms retain their shape, both within and without the phagocyte. 



Fig. 3. — White Blood Corpuscles digested with unheated serum and culture of the 

 Cholera Yibrio for 15 minutes at 37° C. Shows, in the case of the 

 extra-cellular micro-organisms, complete agglutination and spherulation. 

 Two of the micro-organisms in the interior of the phagocyte — pre- 

 sumably those first ingested — retain their characteristic shape. 



Fig. 4. — White Blood Corpuscles digested with heated serum and culture of the 

 Cholera Vibrio for 15 minutes at 37° C. Shows vacuolation of the 

 phagocyte and no alteration in the micro-organisms, either within or 

 without the phagocyte. 



Fig-. 5. — White Blood Corpuscles digested with unheated serum and culture of the 

 Bacillus anthracis for 15 minutes at 37° C. Shows the phagocyte 

 extending itself in such a manner as to inraginate the bacilli. 



Fig. 6. — White Blood Corpuscles digested with heated serum and culture of the 

 Bacillus anthracis. Shows an anthrax thread lying upon a phagocyte, 

 which makes no attempt at phagocytosis. 



"Sunspot Variation in Latitude, 1861— 1902." By William J. 

 S. Lockybr, M.A. (Camb.), Ph.D. (Gott.), F.B.A.S., Chief 

 Assistant, Solar Physics Observatory. Communicated by Sir 

 Norman Lockyer, K.C.B., LL.D., F.K.S. Eeceived January 16, 

 — Eeacl February 11, 1904. 



[Plates 4 and 5.] 



In a previous communication,* Sir Norman Lockyer and I gave 

 the results of a discussion of prominence observations, and pointed 

 out the necessity of dealing individually with small zones on the solar 

 surface. 



In that paper brief reference was made to the law of spot zones, as 

 discovered by Carrington, and corroborated by Sporer, and it was 

 further stated that more modern observations had established these 

 general deductions of spot distribution. The words " general deduc- 

 tions " were purposely used, as it was then noticed that there were 

 many anomalies that required explanation. 



The object of the present paper. is to draw attention to these 

 anomalies, and to give the results that have been deduced from a 

 minute examination of the changes of heliographic latitudes of sun- 

 spOts from year to year. The present evidence indicates that the law 

 of Sporer, although of great importance, represents only a very general 

 idea of a complicated sunspot circulation. 



* "Solar Prominence and Spot Circulation, 1872—1901," 'Roy. Soc. Proc.,' 

 vol. 71, p. 446. 



