76 THE UNIVERSITY OF OKLAHOMA 



vanian area of northern Texas ; and the Alibates dolomites of the 

 Texas Panhandle, with a number of other less important sources. 



Mr. J. B. Thoburn of the Historical Society to whom this 

 paper was submitted, made the following comments : 



At a point twelve miles north and four miles west of Boise 

 City Cimarron County, I found an outcrop of sandstone (Dakota?) 

 which had been metamorphosed and which contained numerous 

 nodules of quartzite, which being harder than the embedding ma- 

 terial, had bucn exposed by erosion. These had been knocked off 

 or otherwise detached by primitive man and rejects and spalls 

 were numerous. Quartzite implements, either complete or frag- 

 mentary, are numerous in the surrounding region. 



There is a projecting ledge of massive white flint or chert, 

 aiiout three miles northeast of Kenton in the same county, from 

 which hundreds, if not thousands, of tons of material have been 

 removed, probably throughout a period of several thousand years. 

 This material is alm.ost as white as porcelain. 



SOME STUDIES WITH COMPLEMENT 

 DEFICIENT GUINEA-PIGS 



H. D. Moore. 



Abstract. 



The principal observations of scientific interest are as fol- 

 lows : 



1st. That the blood sera of some guinea-pigs are greatly de- 

 ficient in complement. 



2nd. That guinea-pigs deficient in complement are also lack- 

 ing in resistance to disease. 



3rd. That the lack of complement does not hinder the pro- 

 duction of artificially acquired immunity. 



4th. That guinea-pigs deficient in complement are also deficient 

 in normal opsonins. 



5th. That this deficiency in complement is an heritable con- 

 dition (Published in full in the Journal of Immunology Vol. 4, 

 No. 6, Nov. 1919). 



