No. 22. THE PENNSYLVANIA STATE COLLEGE. 231 



absolutely worthless upon arrival, no embryo being found in any of 

 the fruits. This fact is further demonstrated by the column of germ- 

 inations in this table. The Colorado seed was but 30 per cent, good, 

 and all the rest above 70 per cent. good. Every sample was reported 

 us coming from native trees, with the exception of those from Penn- 

 sylvania, being from trees upon the College campus. Germina- 

 tions began April 22 and continued until June 1. A great abundance 

 of plants was obtained from all good seed, and a vigorous growth 

 has been made each season. The tallest are now (August, '99) from 

 50 to 140 inches high, with thick branches. Winter killing has not 

 figured among the box elders. 



Table VI. The seeds of the green ash were all from native trees 

 with the exception of those from Colorado and Pennsylvania. In 

 the former case the largest number of seedlings (399) was obtained, 

 and in the latter the smallest number (2). These seeds are dupli- 

 cated in Table XIII, where Colorado seed gave 816 plants and Penn- 

 sylvania seed 313 plants. The seed of the blue ash (Fraxinus quad- 

 rangulata), from Kentucky, failed to germinate, hence, it does not 

 appear in any table. It was planted with the green ash. Strong 

 growth was made by all the ash trees of this series. The tallest now 

 (August, '99) stand from 36 to 85 inches high, having made a growth 

 the past season from 2 to 3 feet long. 



Table VII. Only six samples of white ash seeds were received. 

 These were all from native trees. The seedlings have not been as 

 vigorous as the green ash. This is plainly indicated by the figures 

 under vigor, maximum growth and winter killing. The Pennsylvania 

 plants were very weak from the start and all of them were killed 

 during the winter just past. 



Tables VIII to XV. The seeds planted in the second year of this 

 experiment are found in the subsequent tabes, VIII to XV, inclusive. 

 They were received here in midwinter, stratified, and all planted 

 April 14, 1898. On October 1, 1898, the seedlings were taken up, 

 stripped of their leaves and a certain number of each lot transplanted. 

 It is interesting to observe what effect transplanting combined with 

 the severe winter following had upon them. Among the black wal- 

 nuts a smaller per cent, was killed than among the one year older 

 plants which were not transplanted. Among the bur oaks, two- 

 thirds of the transplanted lot died, whereas but one-half of the older 

 plants were 'lost. Among the hackberries one-third of the trans- 

 ' planted lot died and one-fifth only of the older lot. Among the honey 

 locusts one-tenth of the transplanted lot died and about one-sixth of 

 the older lot. Among the box elders one-third of the transplanted 

 lot died and one-eleventh of the older plants. Among the green ash 

 one-sixth of the transplanted lot and one-thirty-fourth of the older 

 lot were lost. Among the white ash three-sevenths of the trans- 

 planted lot and about three-seventh of the older lot were lost. 

 .-27 



