THE SCIENTIFIC ROLL 



AND MAGAZINE OF SYSTEMATIZED NOTES 



This Work is a Valuable Guide, Bibliography, and Index to Science. 



1. A Bibliography classified according to subjects arranged according to the year 

 publication, and alphabetically under each ?ear according to the name of the author; 

 ch ithem has its dh-tinctive number for référence purposes. 



2. An Index, which, although, arranged alphabetically, is classified in groups more 



talgamate the various subject indexes into one gênerai classified index. 



3. A Systematized Collocation of Facts grouped according to their relationship to 

 ;h other. The aim of the whole is to enable any person engaged in scientifie research 



find the information he seeks with a minimum expenditure of trouble, time 

 3 cash. 



As the work is the resull of forty years labour, its main features cannot be fully 



MINÉRAUX, FOSSILES, ROCHES 



COLLECTIONS DE PLAQUES 

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60 plaques minces. 



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d'après H^Rosenbu^ °mi^M^^dePmfn^aux , III e éditio0 ' 



Stuttgart, 1896. 



120 plaques minces de 67 minéraux dans un élégant étui, frs. 225. ! 

 50 plaques minces de 34 minéraux différents dans un élégant étui, frs. 87,50. 

 e) Collections de plaques minces de roches auxquelles est ajoutée une courte dj 

 • ïhytiographie microtcopique des roche» , IIP édition tome % Stuttgart, 1897. 

 Collection de 1-20 180 250 plaques minces. 



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Le nouveau catalogue des minéraux, météorites, etc., 

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 Fin janvier 1899 a paru le grand catalogue cristallographiqM- 

 IV F. Krautz, liottiv b/l, fttfli" 

 Comptoir minéralogique rhénan. 



