TREES AND PLEASURE GROUNDS OP PENNSYLVANIA. 



year, guano another, or better still, a good coat of yellow loam from an old pasture 

 Trenching is the radical cure, as it creates a deep soil. Old mother earth will assuredly 

 turn up her nose at being drugged with one kind of manure all the time, as she invariably 

 does, at pi'oducing the same crop for a succession of years, on the same space. A rotation 

 of manures, and a rotation of crops, are in my opinion, governed by the same laws. Oc- 

 casionally I see a correspondent in your Journal who has got sick of using stable manure, 

 resort to Guano, bone-dust, spent tan, &c., and finding beneficial results arise therefrom, 

 immediately sings the praises of guano, spent tan, &c., and their superiority over stable 

 manure — so overjoyed is he, that he thinks he has discovered the philosopher's stone. My 

 opinion is, that his success proceeds more from having employed anew agent, than to any 

 intrinsic virtues that either the guano or tan-bark possess over stable manure, which if 

 followed up for any length of time, would soon demonstrate the necessity of a change. I 

 therefore look upon a deep, well trenched soil, as the great ameliorator. A rotation of 

 crops, and a rotation of manures, and mulching, I advocate as much as trenching; and 

 tan-bark is the very best material for the latter purpose, which is all it is good for. I 

 should be very hard pushed when I should mix it with the soil, notwithstanding that Mr. 

 Clevelaxd's grape vine found their way into it. They were attracted there by the mois- 

 ture which the tan holds; the roots were evidently near the surface, and a pile of saw- 

 dust, or leaves, or any non-conductor of heat, would produce the same results. I fear I 

 have trespassed too long on your valuable space — but as Irishmen sometimes have a round- 

 about method of conveying their ideas, I lay claim to every indulgence that is extended to 

 them on that head. I am sir, yours respectfully, John Quinn. 



Ida Farm, Troy, Decembtr 17, 1850. 



TREES AND PLEASURE GROUNDS OF PENNSYLVANIA. 



BY A MASSACHUSETTS SUBSCRIBER. 



" The oak now stately grown, beneath whase boughs 

 Have chikheus' cliilch-en plaj'od, his care liad reared ; 

 And a deep grove lie sees that when a youth 

 Was but a thicket, now with liim grown old." 



The grounds which I described in a former number of the Horticulturist, were not only 

 planted by the hand of taste, but had been kept with care; to the one of which I shall 

 now speak, time had added new beauty in its stately trees, but his destroying finger was 

 visible in all else. As we approached the former residence of Humphrey INIarshall, (near 

 the village of Marshall ton,) the massive foliage of a variety of trees rising above a dilapi- 

 dated fence, gave us a foretaste of what awaited us. We were directed to an old gate as the 

 nearest entrance, but found, when it was with diflSculty opened, that a huge Tecoma, or 

 trumpet creeper, and Aristolochias twining their cordage like branches from tree to tree, 

 barred the passage — the gentlemen of the party effected an entrance for us through the 

 luxuriant vines, and we stood in what was once the pride and delight of one of the earli- 

 est arboriculturists. Marshall was first cousin to John Bartram, and from him he 

 probably derived much of his knowledge of plants, for in 1773 he followed his cousin's 

 example, and commenced this botanic garden, where he gathered together the most inte- 

 resting trees, shrubs, and herbaceous plants of our country, with many curious exotios. 



In 1785, he published an account of our native trees and shrubs, entitled jirhustum 

 jlmaricanum, the first work of the kind printed in this country. It received little 

 tion hero, as it was half a century in advance of the age — it was, however, quickly 



