122 
Miscellaneous Notices 
4 Use of Chloride of Lime in Gardening — Chloride of lime, it is said, will de- 
stroy insects on trees, and prevent effluvia from arising from vegetables or other mat. 
ter in a state of decomposition. It was used in France to preserve the bodies of those 
unfortunate persons who had destroyed themselves, until owned by their friends. A 
body, if washed with the preparation, will keep for weeks without alteration or 
offensive odour. Timber washed with it will be preserved from the effects of damp 
and confined air, and it would also prevent the spread of dry-rot, and destroy 
insects on plants — Gard. Mag. III. 354. 
5 Succession tf Crops. — The alternation or succession of crops, found to be of 
so much importance both in gardening ami agriculture, has been proved to be a ge- 
neral Jaw of nature by M Dureau de la Malle, in the Ann. des Scicnc. Nat. , tom. 
v. p 553., Aout, 1825. The facts which he brings forward are perfectly consistent 
with the experience and observation of various naturalists and cultivators- The 
botanist Ray observed, after the great fire of London in 1666, that Sisvmbrium Irio 
sprung up among the ruins, where it had never bet it seen before ; and Professor Pal- 
las, in the end of last century, observed in Russia that, when pine forests were des- 
troyed by fire, they were not succeeded by the pine or fir tribe, but by wild service, 
birch, lime, poplar, and analogous trees. Dr. Dwight also, in the beginning of the 
present century, found that his grandfather’s field near Northampton in Pennsyl- 
vania, which a century before was covered with oaks and chestnuts, after being 
under the plough for two generations, and then left to itself, brought forth a thick 
grove of white pines, without a single oak or chestnut tree. From the various 
instances, both of herbaceous and ligneous vegetables, adduced by M. Dureau, he 
concludes that the succession of plants is a fundamental law of vegetation in a state 
of nature ; and that its imitation by art, in our fields, gardens, and woods, Is of the 
first importance — Gard. Mag. III. 208. 
6— On the Preparation of artificial Ultramarine — M. Graelin, of Tubingen, has 
published the following process, (which he says succeeds infallibly,) for preparing 
ultramarine. Procure hydrate of silica and of alumina, the first, by melting to- 
gether well-pulverized quartz with four times as much carbonate of potash and by 
dissolving the melted mass in water, and precipitating by muriatic acid ; the second, 
by precipitating a solution of pure alum by ammonia. These two earths should be 
carefully washed with boiling water. After that, determine the quantity of dry 
eaith which remains, after having heated a certain quantity of the moist earth to 
5 fi d nari« i ^ ,Ca "''"''I* 1 made use of »»y experiments contained 
56 parts in 100, and the hydrate of alumina 3.24 parts of anhydrous earth. 
Afterwards dissolve with heat, in a solution of caustic soda, as much of that 
Thtn “ Wl11 dl8s "lve, ami determine the quantity of earth dissolved. 
^nfainf k %o r of , thls . anhydrous silica, a quantity of hydrate of alumina 
containing 7° parts of dry alumina. Add to it the solution of silica, and evaporate 
powder* 6 t0getber ’ constant ly stirring the mixture, till there remains only a moist 
wbTrbl«nT b i na s ti0n i° f Si l’? a ’ aluraina ’ and soda > is the' basis of the ultramarine, 
manner. be C ° loUred by 8ul P huret of sodium, which is done in the following 
parte" o/sulnhur foil!’' 6 f, * rnisdled u ith a over fitting close, put a mixture of two 
a d ll r d t t d ° f an hydrous carbonate of soda. Heat gradually till, at 
a dull red heat, the mass is well melted ; then project this mixture in very small 
ow^nTto the" van 1110 ° f the meltt ‘ d mass ’ As »°° n the effervescence, 
owing to the vapour of the water, ceases, throw in a fresh portion. Having kept 
twr:t:;^7 r ? > derat . e,y r - d ^ re,nove u f ™ m sssss 
the uTf rili of *'; lph, ,‘ r ’ dr ; ve l, y a moderate heat In case all parts of 
ieducW ?h , ar<> not “dotu’ed equally, the finest parts may be separated, after 
xxxvi 409 ° very hne PWwder ’ by wasbin e with water. — A tin. de Chimie, 
GeLwa h s Ultef T Tv ~~ ^ . lle ’f lae °/ r M«nt Blanc and of the Lake of 
the service of L Cr^' LT'™^ Af K «««r, a '> officer of engineersin 
be 4435 metres 1 a > “ !t ° f tlle mountain appears to 
of the lake 367 metre’ i'c^k , th l lake of Geneva, and the surface 
therefore, 15 775 fem ahn ab ? ve the sea - The mountain is, 
’ ’'' 7& ,eet above the level of the sea. -Quart. JT 0 ur Sc iii N S. 502. 
Erratum in No. 3. P. 92. 1. 15, /br union, read unringed. 
