THE BOSTON JOURNAL OF CHEMISTRY 



has been established fifteen years, and, as a medium for 

 furnishing the current scientific and chemical topics and 

 news of the day, in a popular and attractive form, it has 

 no rival in the English language. 



With the largest circulation of any chemical and 

 popular science periodical in the world, it has long re- 

 ceived the indorsement and support of the leading 

 Physicians, Druggists, Chemists, Artists, Me- 

 chanics, Farmers, Manufacturers, and Scien- 

 tific Men in the country. 



Sent Three Monltis on trial, postage free, for 25 cents. 



Now is the best time to get up clubs. Agents and 

 canvassers wanted at every place, with whom liberal 

 arrangements will be made. If you do not wish to act 

 as agent, please send the name and address of some 

 reliable parties who will do so. Specimen copies sent 

 free on application. 



ONE DOLLAR A YEAR, IN ADVANCE. 



All communications concerning subscriptions and other 

 business matters should be addressed to 



JOURNAL OF CHEMISTRY COMPANY. 



167 Higb St., Boston, Mass. 



COCCIDiC WANTED. 



The undersigned is desirous of obtaining, by exchange or otherwise, specimens of as many species of the COCCID^* 

 as possible, for the purpose of making a study of the North American forms. Those found infesting cultivated plants especially 

 de-iired. Living specimens preferred when they can be obtained. 



J. HENRY COMSTOCK, Department of Agriculture, Washington, D. C. 



TAXIDERIvriST, No. 32 NASSAU STREET, BROOKLYN, N. Y. 



NEW AND IMPROVED ENTOMOLOGICAL FORCEPS. 



Length 6i inches, of the form shown in above cut, made of fine spring steel, and nickel plated. Price $1 .50. Also constantly 

 on hand for sale. Sheet Cork for insect boxes, size 13x3ixJ, $1.25 per dozen sheets. Entomological pins, Klaeger and 

 Karlsbader, superior quality, $1.25 per 1000. Insect net rings and other Entomological Supplies. Also dealer in native and 

 exotic bird skins, insects, etc., etc. Exotic lepidopetera a specialty. 



N. B. — The above prices do not include the cost of transportation. ^ ___^ 



LONDON PURPLE 



MARK, 



Valuable Insecticide for the extermination of the Colorado Beetle, Cotton Worm anc Cankerworm. 



For Prices, Circulars .^nu Opinions, write 



HEMINGWAY "LONDON PURPLE" COMPANY, LIMITED, 



90 WATER STREET, NEW-YORK. 



R. &J. BECK, 



Manufacturing Opticians, 



PHILADELPHIA, 



Offer the largest, cheapest and most complete 

 assortment of 



Microscopes and Magnifiers 



IN THIS COUNTRY. 



Microscopes from 30 cents to $1500. 



Together with everj'- description of 



Mounting Instruments and Materials, 

 PREPARED OBJECTS, &c. 



Our fully Illustrated and PRICED CATALOGUE 

 of 150 pages mailed to any address on receipt of ten 

 cents or three stamps. 

 Our CONDENSED LIST of 24 Pages FREE. 



