John Wheldon & Co. 
The Scientific and 
Natural History Booksellers. 
Have in stock nearly all requirements in_ books, 
pamphlets, and periodicals, relating to Chemistry, 
Agriculture, Gardening, Forestry, Botany (syste- 
matic, economic, and geographical), Zoology (in- 
cluding Ornithology, of which the stock is probably 
the largest in the world, Systematic and Economic 
Entomology, Works on Mammalia, Reptilia, Fish 
and Fisheries, Mollusca, Invertebrate, &c.), 
Microscopy, Geology, Palaeontology, Minerology, 
Mining, Metallurgy, &c. both new and second-hand. 
Catalogues, price 2d. each (only a limited number 
available). 
38, Great Queen Street, Kingsway, 
London, W.C. 2. 
Telephone: Gerrard 1412. 
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