GLOSSARY 319 



INOCULATION. To seed, to transplant; as to inoculate 

 milk with lactic acid germs. 



INSULATION. The state of being protected from heat and 

 cold by non-conducting material. 



LEAD. The amount of opening of the steam ports when 

 the engine is on the dead center. 



LOPPERED MILK. Milk that has thickened. 



MAMMARY GLAND. The organ which secretes milk. 



MEDIUM. The substance in which bacteria live. Thus, 

 milk furnishes an excellent medium for the growth of 

 bacteria. 



MENISCUS. A body curved like a first quarter moon. 



MILK SERUM. Milk free from fat. Thus, skim-milk is 

 nearly pure milk serum. 



MIXING CANS. Small tin cans used for mixing milk pre- 

 paratory to testing. 



NEUTRAL. Possessing neither acid nor alkaline prop- 

 erties. 



NON-CONDUCTOR. A material which does not conduct 

 heat or cold, or only so with great difficulty. 



OSMOSIS. The tendency in fluids to diffuse or pass 

 through membranes. 



PARTURITION. The act of being delivered of young. 



PASTEURIZATION. The process of destroying all or most 

 of the vegetative bacteria by the application of heat 

 from 140 to 185 F. 



PERIOD oE LACTATION. The time from calving to "dry- 

 ing up." 



PHYSICAL PROPERTIES. The external characteristics of a 

 body, like color, odor, hardness, solubility, density, 

 form, etc. 



PROPAGATE. To continue to multiply. Thus, to propa- 

 gate a starter means to continue multiplying the lactic 



