Scientific Intelligence.—Miscellaneous. 189 
fixed in this manner, the wall is suffered to dry. Before the painter 
begins, he moistens the part on which he purposes to work with 
distilled water, squirted on by a syringe. THe then paints; if he 
wishes to repaint any part, he moistens again. As soon as the 
picture is finished, it is syringed over with water-glass. After the 
wall is dry, the syringing is continued as long as a wet sponge can 
remove any of the colour. An efflorescence of carbonate of soda 
sometimes appears on the picture soon after its completion. This 
may either be removed by syringing with water, or may be left to 
the action of the atmosphere.’ 
- “ Not to dwell on the obvious advantages possessed by the stereo- 
chrome over the real fresco (such as its admitting of being retouched 
and its dispensing with joinings), it appears that damp and atmo- 
spheric influences, notoriously destructive of real fresco, do not in- 
jure pictures executed by this process. 
“* The following crucial experiment was made on one of these pic- 
tures :—It was suspended for twelve months in the open air, under 
the principal chimney of the New Museum at Berlin; ‘ during that 
time it was exposed to sunshine, mist, snow, and rain,’ and never- 
theless ‘ retained its full brilliancy of colour 
** The stereochrome has been adopted on a grand scale by Kaul- 
bach in decorating the interior of the great national edifice at Berlin 
already alluded to. These decorations are now in progress, and will 
consist of historical pictures (the dimensions of which are 21 feet in 
height and 242 in width, single colossal figures, friezes, arabesques, 
chiaro scuro, oe On the effect of the three finished pictures, it 
has been remarked by one whose opinion is entitled to respect, that 
they have all the brilliancy and vigour of oil-paintings, while there 
is the absence of that dazzling confusion which new oil-paintings are 
apt to present, unless they are viewed in one direction, which the 
spectator has to seek for. 
‘Mr A. Church has suggested, that if the surface of oolitic stones 
(such as Caen-stone) is found to be protected by the process already 
described, it might be used, as a natural intonaco, to receive coloured 
designs, &c., for exterior decorations ; the painting would then be 
cemented to the stone by the action of the water-glass. 
** Mr Church has also executed designs of leaves on a sort of terra 
cotta, prepared from a variety of Way’s silica rock, consisting of 75 
parts clay and 26 of soluble silica. This surface, after being hard- 
ened by heat, is very well adapted for receiving colours in the first 
instance, and for retaining them after silication. 
18. On the relative values of diferent kinds of Meat as Food, by 
Marchal of CalviimM. Marchal took 20 grammes of the muscles 
of the pig, ox, sheep, calf, and hen, which contained neither sinews 
or cellular tissue, or adhering fat, except what naturally exists be- 
tween the muscular fibres, and dried them in a water bath for several 
