208 MASS. EXPERIMENT STATION BULLETIN 180. 



The figures of the table indicate that, in both tests, the White machine 

 apparently affected the keeping qualities of the fruit about the same as did 

 the Hayden. This result is surprising, and must be verified by future 

 experiments. The difference in the tendency to rot between the separated 

 and unseparated berries was not as great as in last year's tests. This may 

 have been partly due to the injury that all the lots of fruit probably re- 

 ceived in the carting, this perhaps partly hiding the real difference in the 

 damage done by the various methods of cleaning. 



9. The Injury to the Keeping Quality of Cranberries caused by Separators 

 employing the Bouncing Principle and by the Drop in the Barrel. — That 

 this varies greatly with different lots of berries was indicated by the results 

 of half a dozen minor experiments conducted by Dr. Stevens. The range 

 in the increase of decay caused by these factors in these tests was from 

 about 14 to about 127 per cent. 



A new arrangement devised bj'- the writer for preventing the barrel in- 

 jury, for use both in screening and in connection -with separators, works 

 well mechanically and promises to be generally satisfactory, though no 

 storage tests have been conducted to determine the degree of its effective- 

 ness. This device is on exhibition at the offices of the New England Cran- 

 berry Sales Company, Middleborough, Mass., and the J. J. Beaton 

 Growers' Agency, Wareham, Mass., and it also may be seen at the station 

 screenhouse at East Wareham at any time during the cranberry season. 



10. The Effect of Grading on the Keeping of Cranberries. — The two fol- 

 lowing series of tests come under this head : — 



(a) Two lots of Early Black berries picked in the same location on the 

 station bog were treated as shown in Table 14. To make sure of their 

 being well cleaned they were run through a Hayden separator twice imme- 

 diatel}^ before they were stored. Onlj^ the berries going into the separator 

 barrels were used in the test. Neither lot was hand-screened. They were 

 stored in bushel picking crates of the same dimensions and construction. 

 The Hayden grader was used. A board was in the grader frame in place 

 of the grader while the second lot was run through. The spacing of the 

 grader, fourteen thirty-seconds of an inch, was wider than that commonly 

 used, and it took out from a fifth to a quarter of the entire quantity of 

 berries put through the separator while it was in use. 



