INSPECTION OF FERTILIZERS. 165 



AMMONIACAL COPPER CARBONATE. 



Copper carbonate i ounce. 



Ammonia water I quart. 



Water 9 gallons. 



For this purpose take the strongest ammonia, 26 degrees 

 Beaume, and dilute it with seven or eight volumes of water 

 before using. This stock solution may be kept indefinitely in 

 closely corked bottles. Dilute as above when ready for use. 

 Several other formulas for the solution of copper carbonate are 

 given, but this one will be found most convenient. 



There are many other valuable insecticides and fungicides, 

 but those above named are the most important. It is hoped 

 that the warfare against disease and insect enemies of the 

 orchard will be waged this year as never before. 



Maine State College, 

 Orono, Me., April 10, 1896. 



BULLETIN No. 30. 



INSPECTION OF FERTILIZERS, 1896. 



The bulletin gave the manufacturer's guarantees, the analyses 

 of manufacturer's samples and of samples collected by the 

 Station, but as these figures are of only passing value they are 

 omitted here. 



BULLETIN No. 31. 



A MODIFICATION OF THE BABCOCK METHOD 



AND APPARATUS FOR TESTING MILK AND 



CREAM. 



J. M. Bartlett. 



The modifications described in this bulletin, briefly stated, are 

 as follows: 



The modification of the method consists chiefly in filling the 

 bottles with hot water after the milk or cream and acid are 



