134 
ral very interefting experiments to afcer- 
tain the combuftibility of the diamond. 
This ftone being laid upon red hot 
coal, and expofed to the effects of vital 
air, was totally decompounded without 
leaving the {malleft particle. As foon as 
the diamond had attained to a thorough 
glow, during which it was obferved to 
fwrell, it beean as obvioufly to decreafe in 
fize.. All this time vapours exhaled from 
it, till after the expiration of five minutes 
it totally difappeared. ‘That this was 
not the effect of mere evaporation, but 
that actual combuftion took place is de- 
monftrated by the circumftance, that as 
foon as the diamond was brought to a 
thorough white glow, it continued to 
burn of its awn accord, and became 
paler when the coal difcovered a vifible 
fiame, and was mot cooled by the torrent 
of vital air. 
The celebrated profeffor SPALLAN- 
ZANI having obferved, that certain fpe- 
cies of bats appeared to be able to direct 
their flight in a room perfeétly dark as 
well as in the light, has made feveral 
truly barbarous experiments on tis fub- 
jet. He began by pafting up the eyelids 
of thefe animals, after which, when let 
loofe, they flew about a room m the fame 
manner as if their eyes were open. Not 
content with this experiment, he had re- 
courfe to the cruel expedient of deftroy- 
New Mufical Publications. 
Aug.] 
ing the eyes entirely, aud even after this 
operation they flew perfeétly well from 
one apartment to another, aveiding every 
obftacle, and when fatigued fulpended 
themfelves againft the walls in their ufual 
manner. Thefe facts, the learned pro- 
feffor has thought proper to explain by 
fuppofing that they poffefs a new fenfe, 
unknown apparently to other animals, 
but which enables thefe to direét their 
motions when deprived of eye-fight. 
Mr. JuRINE, of Geneva, has repeat- 
ed many of thefe experiments with confi- 
derable accuracy. He extended feveral 
twigs of willow acrofs a room, and let 
foofe two bats which in their flight paffed 
and repaffed between thefe twigs and al- 
ways returned to the fame refting place 
on the cornice of the room. He then 
blinded thefe bats by deftroying their eyes 
and on again turning them into the room, 
their flight was as perfect as before. Af- 
terwards on turning loofe ene bat that 
faw, and another that was blinded, the 
latter followed the former in every part 
of its flight, paffing through all the open- 
ings between the twigs with as much ac- 
curacy as its leader. Mr. J. however, 
found afterwards, that if the ears of a 
blinded bat were filled with pomatum it 
was no longer able to fly fteadily,an 
with exa¢tne(s. 
ee 
REVIEW OF NEW MUSICAL PUBLICATIONS. 
IRST Leffons for the Piano-Forte or Harp- 
fichord, dedicated to Mifs Mary Low- 
THER, dy Mr. Bemetzrieder, 3s. 
This is one of thofe many didactic 
and ufeful works which Mr. BEmMeET- 
ZRIEDER has given the public, and in 
which, for the moft part, he has dif- 
played confiderable fcience, as well as an 
intimate acquaintance with the beft modes 
of inftru€tion. The pupil is here pre- 
feated with the keys of the inftrument, 
connected for the fingering, with their 
literal names and the mufical fyllables. 
The rules given for fingermg are applied 
to the particular performance of the ex- 
ercifés in the book, but neverthelefs reter 
#0 general practice, and may be rendered 
extenfively ferviceable to a ftndious ob- 
ferver. The mufic added, by way of 
leffons, is that ef ** La Chaffe,”’ a French 
minuet, “ La Folie,’? Sufan’s Advice,” 
and a Sonatina. 
Duetto per Violino et Viola, compofed by Gio. 
Amadeo Moyart. 2s: 6d. 
Longman and Brodzrip. 
The parts of this Guetto flow together 
Skillern.- 
e& and announces the real matter. 
with admirable eafe and tafte; and the 
execution and graceful turn of the paflages 
promife fo much improvement to the prac- 
titioner, that we cannot but particularly 
recommend it to the notice of learners. 
Three Sonatas, for the piano-forte, with accom- 
paniments for the violin and violoncello, com- 
pofed by Adalbert Syrowetz. 8s. 
Longman and Brederip. 
Mr. SyroweETz has difplayed much 
tafte and theoretical knowledge in thefe 
fonatas. The chiavo ofcuro of mufical 
f{cience has been attended to in the caft of 
the movements, and that connection of 
the paffages preferved which enfures ef- 
Ina 
word, this twenty fecond work of the 
author, is, by its tafte and ingenuity, 
calculated to fupport that reputation 
which his former excellent publications 
have long procured him. 
The Pas de Trois, intreduced in Peggy's Love, 
as danced by Mr. and Madame Laboire, and 
Madamoifelle Hillifoerg. Is 6a. < 
i Longman and Broderip. 
The Pas de Trois, as here given, forms 
an excellent pra&ical leffon. The vari- 
ations 
