MAPLE SYRUP AND SUGAR 



397 



a sugar bush is usually meant a unit of 100 buckets or more regardless 

 of the number of trees. 



The following average figures have been derived as a result of investi- 

 gation covering conditions in New York, Vermont and Ohio : 



From a standard bush of 500 buckets, there is an average yield under 

 all conditions, of about 6400 gal. of sap. This will be equivalent to about 

 200 gal. of syrup or 1500 Ib. of sugar. These equivalents are based upon 

 a determination that 32 gal. of sap under average conditions are required 

 to make i gal of syrup and that 4! gal. of sap are required for i Ib. of 

 sugar. 



Storage Tank 



on Brackets 



with Shed Roof 



\ 



AVood Shed 

 10 'x 12' 



IP 



t 1 Evap< 



aporator 



LU liU LIU U 



Draw off" 



Working Floor 

 Raised 12 in. 



Work Bench 

 30" wide 15 'long 



FIG. 106. Ground plan of a 14- by 2o-ft. sugar house equipped with a modern 



evaporator. 



An average of 12.8 gal. of sap are secured from each bucket in the 

 average bush. Each bucket, therefore, yields about f gal. of syrup or 

 about 3 Ib. of sugar. The number of buckets on each tree, of course, 

 is determined by its size, as explained under the subject of tapping. 

 There are extreme instances on record of groves which averaged 19 gal. 

 of sap per tree per season and of one tree which actually produced enough 

 sap to make 30! Ib. of sugar in one season. One maple tree in Vermont 

 yielded 175 gal. of sap in a single season. 1 Usually from 5 to 40 gal. of 

 sap are obtained from each tree. 



A gallon of good syrup will make about 7! Ib. of sugar testing 80 per 

 cent. 



1 See Proceedings of the Vermont Sugar Makers' Association for 1906. 



