150 ^ THE FLORIST AND 
Hydrostatic pressure might be used by placing the solution in any elevated 
position, in an upper story, for instance, of any building resorted to, and 
bringing it down by a small leaden pipe. 
When the^dessication is effected by heat, as above suggested, it may be 
carried to the temperature of melting tin nearly, say 400 degrees, without 
diminishing the ammoniacal elements. When this heat is used, the whole 
mass becomes friable, and easy to reduce to powder, the bones as well as 
the flesh. Slugs roasted to this point become as brittle as glass. This fact 
was verified on a pretty large scale, by the liberal assistance of Robert 
Gilmor, Esq., of Maryland, who wrote a most favorable account of the 
success of the resulting manure. 
When animal matter, such as slugs or bones, is heated in a closed vessel, 
the first escape of the ammoniacal elements may be detected by a feather 
dipped in muriatic acid, or by a very weak and almost colorless solution of 
blue vitriol or sulphate of copper. 
Fetor is corrected by wood, tar or rosin, which may be made more active 
by mingling with oil of turpentine. 
Sincerely the well wisher of yourself and of the Society, 
Yours truly, 
ROBT. HARE. 
PENNSYLVANIA HORTICULTURAL SOCIETY. 
The stated meeting of this association was held on Tuesday evening. 
May 15, in Concert Hall. R. Buist, Vice President, in the chair. The ex- 
hibition was remarkable for the richness, beauty and variety of the plants 
and cut flowers, in the many contributions shown, and afforded much grati- 
fication to the numerous members and visitors in attendance. Each collec- 
tion presented interesting specimens. In Mr. Buist's were three shown for 
the first time — Azalea vittata rosea, Epacris miniata splendens and Verbe- 
na Kurtz s defiance ; the collection of twelve were choice and well grown ; 
the six Azaleas were handsome plants, and the six Cineraras were fine. 
Among those from Mr. Dundas' houses were three Orchids, one seen for 
the first time, the Oypri'pedium barbatum, the specimen Azalea variegata 
was a gem, and Conoclinum ianthinum choice ; the collection of twelve were 
select, consisting of three fine Rhododendrons, G-ardenia Stanleyana, 
BegoniUs ; &c. ; the six were Begonias, Cuphea, and Deutzia ; there were 
also distinct collections of Cfloxinias, Cinererias and Hyacinths. Gen. 
