Travels in Africa.—Cementing of Broken Glafs. 31% 
have been communicated to the public. In the journey from 
Cairo to Fezzan, he halted at Sewah, which, from the no- 
tices of Mr. Brown, fome months ago, had been clearly af- 
certained to be the Oafis of Ammon. 
Mr. Horneman’s new obfervations, made at his leifure on 
the {pot, now place this matter beyond all manner of doubt. 
Mr. H. was too late this feafon for the caravan that goes 
from Fezzan to Soudan, compreheuding under that name 
Hourfes, Cafhnou, Burnou, the great kingdom near the Ni- 
ger. Meanwhile he has fent from Tripoli, hy another con- 
veyance, not yet arrived, the journal of his prefent.travels 5 
and there is every reafon to hope that he will accomplith his 
great undertaking of vifiting the unknown central regions of 
Africa, efpecially from the following occurrences mentioned 
in his letter :—He was followed from Sewah by a large party 
_ fent to feize him, on fufpicion of his being a French{py. But 
his manners and behaviour were fo completely Moflem, and 
he approved himfelf {fo thoroughly mafter of the Koran, that 
he was releafed with bleilings and alms as a good muffulman, 
and fent forward on his journey, 
CEMENTING OF BROKEN GLASS, 
C. Pajot, of Charmes, Jately tranfmitted to the Philo+ 
matic Society and the National Inftitute, { fmall bits of glafs of 
different qualities, which he had joined and foldered fo firmly 
that the glafs would rather break clofe to the joining than in 
the a€tual place. The form of the fraéture does not at all 
prevent the operation. The line of junétion is fcarcely dif- 
cernible, and in fome places not vifible. C. Pajot has not 
made his procefs known. 
_ C. Swediaur informed the Society, that a perfon named 
Hollenweger, about twelve or fourteen years ago, had in his 
prefence, and that of Lavoifier and Meunier, performed 
fome experiments, by means of which he joined in a folid 
manner, fo ag to make the junction hardly vifible, fragments 
of blown glafs. 
is Chaptal faid alfo that fome perfon had fhewa him, 
about fifteen years ago, a glafs bottle, the neck of which 
"was fo perfeétly foldered to the glafs ftopper, that, when cut 
through, the circle of junction was {carcely perceptible. The 
bottle 
