INFORMATION CONCERNING BOTANICAL ABSTRACTS, Continued 



abstracts of all botanical papers in a specified serial publication, or in a limited number of 

 serials. The Committee is further charged with the duty of maintaining an accurate record, 

 through a system of reports furnished currently by the Collaborators, of the state of abstract- 

 ing for each serial publication. This record enables the Committee to detect and correct 

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 the Committee for 1921 is J. R. Schramm, Cornell University, Ithaca, New York. 



Collaborators of Botanical Absteacts. A large number of botanical workers in all 

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 and abstracts from one or more serial publications as assigned to them by the Bibliography 

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 of the service rendered by Botanical Abstracts. Through their work it is made certain 

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 tional collaborators are therefore earnestly solicited. 



Abstractors for Botanical Abstracts. Collaborators frequently prepare abstracts them- 

 selves, and are thus Abstractors, but they also arrange for others to prepare them. Every 

 abstract is signed by the Abstractor who prepared it, but entries by citation alone are not 

 signed. The Collaborators are responsible for these citations. A list of Abstractors is pub- 

 lished for each volume of Botanical Abstracts. It includes many names of voluntary 

 contributors to the enterprise, besides those of the Collaborators. 



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Readers of Botanical Abstracts are earnestly requested to make careful note of any 

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