Orange St., Brooklyn, N. Y., and Mr. Chas. W. Jenks, 

 Bedford, Mass. The value of these sets may be esti- 

 mated from the fact that but seven public libraries have 

 been able to fill their sets, though we have a standing 

 order for the missing numbers. Within the past month 

 single volumes have sold for $3.00, and we know of two 

 or three instances where single copies changed hands at 

 $2.00. Not all the back numbers are worth this much, 

 but these instances go to show the value that may be 

 attached to them. If any of our readers have duplicates 

 of any numbers earlier than volume VI. and will let 

 us know, we will find them purchasers. Meanwhile we 

 would say that if those who have nearly complete sets 

 will send us a list of their lacking numbers on a postal 

 we will do our best to fill their sets. Send on a postal so 

 that your list will be filed with the rest and not over- 

 looked. We have several notices of those whose sets 

 are complete from Vol. V., No. 1. If you are among 

 these let us know. 



Hart's-tongue Rooting at the Tip. — Mr. H. E. 

 Ransier, Manlius, N. Y., writes : " Scolopendrium vulgare 

 is credited with rooting at the tip of its fronds, occasion- 

 ally, but who has ever seen it so doing in America? 

 Maxon and House reported almost having done so, but 

 as I recall their account of it, it was not a well marked 

 example. My personal observation of the fern has not 

 disclosed a single instance of its occurrence among many 

 thousands of specimens seen the past five years." In 

 reply to this it may be said that any fern, or any other 

 plant for that matter, that produces new plants on any 

 part of itself, does so through the formation of adventi- 

 tious buds. In flowering plants these adventitious buds 

 are most frequent upon the roots and stems, but they 

 also occur on leaves as in certain begonias. In some 

 plants the adventitious buds are more easily produced 

 than in others and so it happens that only a certain few 

 of our ferns have this habit. The tip of the frond bend- 



