Page 8 
St. Louis, Mo. 
BELDT'S AQUARIUM 
Thermal Aerator 
SUPREME AIR PUMP 
JUNIOR MODEL 
60 Cycle—110 Volts A. C. Current 
Price $8.00 
Will operate on 110 or 120 volts. It pumps fresh air in regu¬ 
lar cycles into the aquarium. Full directions come with each 
aerator. 
Price $ 1.50 
Here is the Pump for the average small pet 
shop or fancier. It will supply 10 outlets with 
plenty of air. 
It has 12 lbs. of stalling pressure and will 
operate on 3 to 4 cents per day. 
Shipping Weight 8 Lbs. 
The New Gem Microscope 
$14.50 
An exceptional value. So 
powerful and clear that you 
see the heart beat inside of a 
live daphnia. 
RUSTIC AQUARIUM 
Size 18" Long, 10" Wide and IO'/ 2 " High 
Gallon Capacity 7 
Price Each $8.00 
Finish—Highly Glazed Natural Imitation Walnut 
The Gem magnifies 72 to 150 diameters. An additional objective lens, 
for $2.50, increases the magnification to 300 diameters. A third objective 
can be added to raise the power to 375Xi $2.50 also. So precise is the 
optical system that even at the greatest magnification there is none of the 
blurry color-fringe characteristic of inferior lenses. The many Gem advan¬ 
tages are worth seeing. Price $14.50 with one objective (75X to 172X)• 
