[ 325 ] 
in the aquatic Mofs, &c. The Eggs are Toon 
hatch'd ; the young Reptiles creep amongft the Stones 
and Weeds, &c. and fo continue Water - Animals 
the grcatcft Part of the Year, until thcSeafon comes 
round for their Appearance in that beautiful Fly 
before you, which is different from our European 
but their Procefs I think well agrees with ours, as 
it is curioufly deferibed and delineated by that Ex- 
cellent Naturalift Mr .Reaumur. They have a great 
Variety of this Tribe of Infects in America , as well 
as we have in Europe. 
VII. Alberti Halleri Archiatri ConJiL 
Aid. Reg. Medic, in Acad. Gottingenf. 
Prof. & Reg. Soc. Lond. Sodal. Expe- 
rimenta aliqua ad Refpirationem perti- 
nent! a. 
Read Feb i. Ontroverfia dc refpirationis modo nu- 
1 749-'5°- per exorta eft, cu;us hiftoriam hie re- 
cenfere nihil adtinet. SufHciat contraxiffe experi- 
menta in duo capita, qux ad rem perfkiendam lpec- 
tant. 
Dubium primum fuir, num mufeuli intercoftales 
inter ni elevent coftas, ut primus vefter Mayovius 
invenit; an deprimanr, ut olim Galenas , turn Fran- 
eifeus Bayle y et alii. 
Dubium alterum fuit, an aer elafticus reperiatur 
T t inter 
