Knowledge. 



With which is incorporated Hardwicke's Science Gossip, and the Illustrated Scientific News. 



A Monthly Record of Science. 



Conducted by Wilfred Mark Webb, F.L.S., and E. S. Grew, M.A. 



JULY, 1913. 



EDITORIAL. 



Seeing that many of our readers find it trying — especially in artificial light — to read " Knowledge " 

 owing to its being printed on art paper, we have decided to make a change. Henceforth a surface which 

 is not highly glazed will be used for the letterpress ; but justice will still be done to the illustrations by 

 putting them on the paper which has recently been used for the whole Magazine. Under these circumstances 

 it becomes necessary to point out to our contributors that illustrations which are to be inserted in the body 

 of the text must be line drawings, while those in tint or photographs which are to be reproduced for the 

 plates must be suitable as to size, and those which are to go on the same page should be as similar as 

 possible in character. 



We take this opportunity of thanking all those who have been helping us to carry on the Magazine 

 and of asking our readers to make suggestions as to articles, especially when they can indicate where 

 suitable material is to be found. Particularly should we welcome astronomical photographs and drawings 

 which would be suitable for plates, and illustrated descriptions of original work which is of general as well 

 as special interest. 



As we have said on previous occasions, we are always ready to hear from our subscribers who have 

 anything to say with regard to the improvement of the Magazine, and also as to what features at present 

 existing might with advantage be emphasised. It is obvious that the larger the circulation the more money 

 there will be to spend on the Magazine, and in conclusion the Editors invite everyone who takes a general 

 interest in the paper to cooperate with them and to do something to make it more useful and more widely 

 knpwn. 



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