ADVERTISEMENTS 



HEADQUARTERS FOR 



Chloride 

 Calcium 



Prime white, full strength, packed in 600-pound iron drums. 

 Representing- the largest output in the country, we are in condi- 

 tion to name interesting- prices for car lots or less quantities. 



PETER VAN SCHAACK & SONS 



138-140 LAKE STREET,-CHICAGO. 



ACCURATE THERMOMETERS. 



Thermometers bought from us at one time give the same result 



as thermometers bought from us at 



any other time. 



Prof. Marvin's Sling Psychrometer 



for the exact determination of moisture in the air, is made 

 with the utmost care and is the best of its class. 



ALL THERMOMETERS MADE BY US ARE 

 GRADUATED AND ETCHED ON THE STEM. 



Send for a Sample of our Storage Room Thermometer. 

 Price, $1.00 each. 



SCHNEIDER BROS. 



265 Greene Street.. ..NEW YORK 



Makers to.. .UNITED STATES WEATHER BUREAU. 



SIGNAL CORPS UNITED STATES ARMY. 

 FISH COMMISSION. 



