86 



ROYAL HORTICULTURAL SOCIETY. 



that M. dc Bary had succeeded in showing that Puccinia gra- 

 minis produces on Berheris, JEcidium Berber idis — a result which 

 affords an additional confirmation of the correctness of my con- 

 clusions*. 



XVII. Additional Note on Hypocaust-Heating. 

 By C. Wykeiiam Martin, Esq., M.P. 



Since my last communication a greenhouse has been built on the 

 hypocaust principle, with a floor of the cement there described as 

 being manufactured by Mr. Bow, of Maidstone, and it is found to 

 answer in every respect. The cost of the pavement is §\d. a foot, 



and the expense of erecting the building, so far as the floor and 

 heating-apparatus are concerned, is as follows : — 



Seager, builder — 



4f days bricklayer -j £ 5< ^ 



3-f days labourer, building brickwork, steps, &c, V 1 12 3 

 for greenhouse. J 



4 j days bricklayer and labourer at furnace 17 



7 J days bricklayer and labourer laying floor, &c. ... 1 8 4 



1 \ load of lime, 3 loads of road-sand and cartage ... 15 1 



2700 stock-bricks at 30s 4 1 



Cartage at 8s. per 1000 1 1 10 



125 fire-bricks and cartage 1 



1 large size damper and frame 4 



3^ cwt. 8 lbs. of cast-iron furnace bars at 15s 2 10 10 



Cartage of ditto 2 6 



£14 2 10 



Bow's bill for paving — 



96 feet super, of Portland paving, 2| inch, at 5%d. 2 4 



Straw for packing 1 



54 ditto 1 4 9 



£17 12 7 



* Dr. de Bary's paper, which is of considerable length, is to be found in the 

 part for January 1865 of the ' Monatsberichte ' of the Prussian Academy at 

 Berlin. An abstract is given in the present number of this ' Journal.' In the 

 ' Sitzungsberichte ' of the Academy of Vienna (a t o1. li. part 1, 1865) is a paper 

 by Beichhardt (on a new species of JEcidium), containing some observations on 

 the connexion between JEcidium and Bocstelia. 



