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EMBRYOLOGICAL 
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Beautifully mounted in the finest 
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Crystal Museum Jars. Neatly labeled 
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de lus Domesticus). Embryos are removed 
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from the eggs and mounted on trans- 
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Order now. Price $8.00 each. 
Seven stages in each preparation. 
P. G. HOWES, 
The Maplewood Biological Laboratory 
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