86 abstracts: bacteriology 



cene or glacial epoch is represented by morainic deposits and some uncon- 

 solidated sands, clays, and gravels. Since the close of Pleistocene time 

 there has been an accumulation of alluvial deposits in the valley bottoms, 

 along the shores and at the heads of the bays. 



The structure of the peninsula is that of an anticlinorium. Faulting 

 has occurred as many places. In some faults the movement along a 

 single plane was as much as 1000 feet, and in others systems of distrib- 

 utive faults developed, with movements ranging from a few inches to 

 several rods along the separate fault planes. Much of the lava that 

 rose beneath the peninsula during the periods of volcanism failed to 

 reach the surface. Some of this remained in vertical or nearly vertical 

 fissures as dikes, other masses spread out between sedimentary strata 

 as intrusive sheets or sills, and some entered the sedimentary series as 

 great laccoliths and lifted the overlying beds in large domes. 



A. H. Brooks. 



BACTERIOLOGY.— XI V. The artificial cultivation of the bacillus 

 of leprosy. Donald H. Currie, Moses T. Clegg, and H. T. Holl- 

 mann, Public Health and Marine Hospital Service. Public Health 

 Bulletin 47. 

 Lepri bacilli were first cultivated artificially in 1909 by Clegg, who 

 grew them in symbiosis with amoebae and s. cholerae. The authors 

 refer to the bearing of this epoch making discovery on subsequent stud- 

 ies of transmission and serum therapy of leprosy, present a review of the 

 literature on the subject, and record the growth of nine strains of acid 

 fast organisms, six being different strains of leprosy bacilli, one the grass 

 bacillus of Moeller, one the bacillus Margarine, and one the Smegma 

 bacillus. The investigations were made at the U. S. Leprosy Investi- 

 gation Station, Hawaii. The cultural characteristics of the above men- 

 tioned organisms are described, and a summary of the results presented. 

 No appreciable difference was noted between the individual cultures 

 of the six strains of lepri bacilli worked with. Only slight differences 

 were noted in any of the organisms, and these are not regarded as being 

 of practical importance as a means of differentiation. The serum of a 

 horse that had been immunized to lepri bacilli strongly clumped all of 

 the strains of this organism worked with, but failed entirely to clump 

 the other three organisms. As a result of their work, the authors con- 

 clude that by the method of Clegg, it is frequently possible to grow an 

 acid fast bacillus morphologically similar to the leprosy bacillus from the 

 tissues and organs of lepers, and that it is possible to isolate this acid 

 ; st organism in pure culture. The acid fast organism thus isolated 



