38 



INTRODUCTORY. 



Fig. 3 is an illusti'atii)ii of a neAv improved pinnp, manu- 

 factured !)}• H. P. (irc<j,(irv ct Co., of San Francisco. This is 



Fi". 3. 



(improved 



I^PRAYiNG 

 PUMP 





CAL 



certainly the best pump for spraying trees that has been 

 offered for sale. It is stronger made tlian most i)Um])S. thus 

 giving more |)owcr. There are only two joints where it would 

 be possible for the liquid to leak out, and these, if properly 

 screwed up, are perfectly tight. The air chamber is very large 

 in proportion to the size of the pump, thereby giving an 

 exceedingly steady s])ray. The cylinders are lined with ).)rass, 

 and the valves are made of the same metal as the l)ody of the 

 pump, including the handle. The outer ])arts are galvanized, 

 thus preventing them from rusting, so that it will preserve the 

 same neat appearance that it has when new. 



This pumj) Avas designed by H. P. Gregory, of the above 

 firm, and is certainly a great im]ivovement. 



