24 



own seeds as to purity the Botanical Department will furnish at cost 

 (25 cents) cases containing- the weed seeds covered by the Dominion Seed 

 Control Act of 1905, together with numbered lists of the names of the 

 weed seeds they contain. These cases with lists can be had at any time 

 by applying to the Botanical Department, O.A.C., Guelph. 



Magnifying Glasses. 



Fig. 23. Tripod Magnifier. 



Fig. 24. Linen Tester. 



Fig. 25. Watchmaker's Lens. Fig. 26. Hand L,ens. 



A small magnifying glass is a necessity in identifying seeds. Sev- 

 eral kinds of cheap glasses can be purchased at almost any jewellery 

 store. Cuts of some of the best of these are given here. Perhaps the 

 most convenient and cheapest glasses are the tripod magnifier and the 

 linen tester. 



Weed Identification and Seed Testing. 



The Department of Botany is at the service of farmers, gardeners, 

 seed merchants and others in the identification of weeds, weed seeds, plant 

 diseases, grasses and economic plants. Clover and other farm seeds are 

 tested and reported upon as to purity absolutely free of charge. Plant 

 specimens and samples of seeds should be carefully packed and addressed 

 with postage prepaid to the Botanical Department, Ontario Agricultural 

 College, Guelph, Ontario. 



