October 1^ 1915] 



SCIENCE 



469 



milk obtained from more than a thousand differ- 

 ent dealers or farmers in the province of Quebec. 



Seven hundred colonies from these -plates were 

 selected for further study, and we found 11 or- 

 ganisms which developed black fields in less than 48 

 hours on sesoulin-bilesalt media at blood heat, and 

 which did not belong to the colou-aerogenes group. 

 These organisms came from the vicinity of Hunt- 

 ingdon, Quebec, but could not be isolated from 

 milk obtained from this district the following 

 spring. 



By keeping the sesoulin-bilesalt agar plates at 

 room temperature for at least five days, more ex- 

 ceptions appeared, seven of which were carefully 

 studied. 



The Harrison-Barlow Nitrooultures and their Com- 

 mercial Application: F. C. Habrison, D.Sc, 



F.E.S.O. 



At the meeting of the Eoyal Society held in 

 May, 1906, Harrison and Barlow read a paper on 

 the ' ' Nodule Organism of the Leguminosse — Its 

 Isolation, Cultivation, Identification and Commer- 

 cial Application." Since that date large num- 

 bers of the so-called nitro-cultures prepared ac- 

 cording to the directions given in the above men- 

 tioned paper were distributed to farmers in 

 Canada and the United States. This paper gives 

 a short account of the commercial application of 

 these nitro-cultures between 1906 and 1914. 

 The Diatoms of the Coast of Vancouver Island, 



B. C: Dr. L. W. Bailet, F.R.S.C, and De. A. 



H. MacKat, F.R.S.C. 



So far as known to the writers of this paper no 

 publications relating to the diatoms of the Pacific 

 Coast of Canada have as yet been made. The es- 

 tablishment of one of the stations of the biolog- 

 ical board of Canada at Nanaimo, B. C, having 

 made it possible to obtain materials for the study 

 of these organisms, some of the results of that 

 study are here presented in preliminary form. 



The total number of species so far identified is 

 over 250, of which a list, with diagnostic meas- 

 urements, is given. Of these several are believed 

 to be new. The characteristics of the phytoplank- 

 ton are distinctly indicated and comparisons are 

 drawn between those of the Pacific and Atlantic 

 coasts, as well as those of the North Sea and the 

 Antarctic, to the latter of which the Vancouver 

 collections bear interesting resemblances. 

 Metallogenetio Epochs in the Pre-Camhr^m of 



Ontario : Willet G. Miller, F.R.S.C, and Cyril 



W. Knight. 



During the vast period represented by the pre- 

 Cambrian rooks of Ontario ore deposits were 



formed at various epochs. Knowledge of the pre- 

 Cambrian gained during the last decade furnishes 

 a means of correlating these ore deposits as re- 

 gards their age and genetic relations. 



Modes of Occurrence of some Gold-bearing Veins 



in the Fre-Camhrian Socles of Canada: J. B. 



Tyrrell, F.R.S.C. 



For nearly fifty years gold has been known to 

 occur in mineral veins in the pre-Cambrian rocks 

 of Central Canada. While the great majority of 

 these occurrences have been too small or poor to 

 allow of mining and milling at a profit, the rich 

 and extensive gold-bearing veins found within the 

 last few years in northern Ontario show that all 

 the gold prospects in the country are not ' ' Will-o- 

 the-wisps" which exist only for the purpose of 

 enticing eager and unwary investors to destruc- 

 tion. 



In the present paper the author attempts to give 

 a brief outline of the character of the mineral 

 veins in the pre-Cambrian rocks of central and 

 northern Canada in which gold has been found; 

 the modes of occurrence of gold in these veins, and 

 the character of the rocks which form their walls, 

 or which are sufliciently near to suggest some ge- 

 netic relationship between them. 



A New Myxohacterium: J. H. Faull, Ph.D., 



F.R.S.C. 



The microorganisms of this form heap up, or- 

 ganizing a stalked, branched or iinbranehed, one 

 to several-headed fruiting body. On the heads 

 columnar or conical cysts develop, on the surfaces 

 of which a membrane is secreted. From these 

 cysts, the bacteria later migrate into the main 

 body of the head, the husks of the cysts persisting 

 as shrivelled and twisted curls. The species ex- 

 hibits a remarkable variability in respect to the 

 morphological features of its fruiting bodies. It 

 stands out as one of the most highly specialized of 

 the order to which it belongs. 



Some Anatomical Features of Willow Galls and 

 their Significance: A. Cosens, M.A., Ph.D., and 

 T. Sinclair, M.A. Presented by J. H. Faull, 

 Ph.D., F.R.S.C. 



A study of the anatomy of certain willow galls 

 led to the discovery of a well-defined aeriferous 

 tissue which is not present in the corresponding 

 regions of normal plants. A search for this tissue 

 in normal plants led to its discovery in primitive 

 areas or ' ' vestige-carriers. ' ' Various experiments 

 were made with negative results, to see if this 

 tissue could not be induced by changing the en- 

 vironment. The conclusions reached are: (1) that 



