190 THE FLORAL WORLD AND GARDEN GUIDE. 
JUNE EXHIBITIONS. 
1—Royat Boranic Socrery.—Conservatory Féte and Exhibition of Flower 
Beds. 
2 To 9.—Mancnester Boranican Socirery.— National Horticultural Exhi- 
bition at Old Trafford. 
5.—BarH AND WesT oF ENGLAND AGRICULTURAL ASSOCIATION.— Opening 
Day of Exhibition at Hereford. 
5,—Sournameron Horticutturat Socrety.—First Summer Exhibition. 
7 anv 8.—Royat HorticutturaL Society.—Great Summer Exhibition. First 
Day, Fruit and Floral Committees, 11 a.m. ; Scientifie Committee, 1 p.m. ; 
General Meeting, 3 p.m. 
13.—Souru Essex Horticutrturat Soctety.—Annual Erhibition. 
14 To 16.—Yorx.— Grand Floral Féte. 
16.—Scorrisn Pansy Socrery.—Annual Exhibition at Edinburgh. 
16 anp 17.—Crysrat Patace.— Great Rose Show. 
19.—Coventry Horticuttura Socrery.—Annual Exhibition. 
20.—RoyaL OxrorpsHIRE HorricutturaL Socrety.—Second Summer Exhi- 
bition. 
21 anp 22.—Ler anp BuackneaTH Horricurturan Socrety.—Annual 
Summer Exhibition. 
21.—Royau Horricutturat Societry.—Fruit and Floral Committees, 11 a.m. ; 
Scientific Committee, 1 p.m. ; General Meeting, 3 p.m. 
21.—Royatn Boranic Soctetry.—Second Summer Exhibition. 
21.—Matpstone Rose Crus.—Annual Exhibition. 
21.—FareHamM AND SoutH HamprsuirE Horricutturan Socrety,—Anaual 
Exhibition. 
21 anp 22.—Spanpinc Horricutturat Socrery.— Annual Exhibition. 
23.—ExertTer Horrticutturat Sociery.— Exhibition of Roses. 
24,—RuicaTE Rose Cius.—Lvhibition of Roses. 
28.—Burron-on-TRENT HorticutturaL Socrety.—Annual Exhibition. 
28 ro 30.—Lxezeps HorrticutturaL Socrery.— Annual Summer Exhibition. | 
29.—F rome Rost Cirus.—Annual Exhibition of Roses. 
29.—RoyaL Horticutturat Society or IreLanp.—Second Summer Exhi- 
bition. 
29.—Ricumonp Horticurturat Socrety.—Adznual Exhibition. 
30.—GarpDENERs’ Roya. BENEvotent InstitutTion.—The Thirty-third Annual 
Festival. 
Tue Inis anp THE Bivue Vioxzr yield a colouring matter of a fine blue colour, 
called Phyllocyanin. The exquisite sensibility of this colour, which is far greater 
than that of litmus, recommends it strongly to chemists as a means for detecting 
alkalis. Guido Pellagri bas a paper on the subject in the Gazetta Chimica 
Italiana. 
TAKING IMPRESSIONS OF PLants.—M. Bertot of the Paris Academy has just 
made known a method of taking impressions of plants, requiring only a large sheet 
of paper, some olive or other oil, blacklead, ashes, resin, or colophony. The paper 
is first lightly oiled on one side, then folded in four so that the oil may filter through 
the pores, and the plant may not come in direct contact with the liquid. The plant 
is placed between the leaves of the second folding, and in this position pressed 
(through other paper) all over with the hand, so as to make a small quantity of oil 
adhere to its surface, Then it is taken out and placed carefully on white paper ; 
another sheet is placed above, since two impressions can be taken, and the plant is 
pressed as before. On now removing it an invisible image remains on the paper. 
‘You sprinkle over this a quantity of blacklead or ashes, &c., and distribute it in 
all directions, as in applying sand to writing : the image then appears in all its parts. 
‘With an assortment of colours the natural colours of plants may be reproduced. 
To obtain fixity resin is added to the blacklead previously in equal quantities ; the 
‘impression is fixed when it is exposed toa heat sufficient to melt the resin. 
