C *01 ] 
XXIV. Remarks on Swallows on the Rhine: 
In a Letter from Mr . Achard, in Privy- 
Garden, to Mr . Peter Collinfon, F. R. S. 
dam : a little below Bafil the fouth bank of the ri- 
ver was very high and tteep, of a fandy foil, fixty or 
eighty feet above the water. 
I was furprized at feeing near the top of the clift 
fome boys tied with ropes hanging down doing fome- 
thing : the Angularity of thefe adventrous boys, and 
the bufinefs they fo daringly attempted, made us ftop 
our navigation to inquire into the meaning of it. The 
watermen told us they were fearching the holes in 
the clift for fwallows, or martins, which took refuge 
in them, and lodged there all the winter, until warm 
weather, and then they came abroad again. 
The boys, being let down by their comrades to the 
holes, put in a long rammer with a fcrew at the 
end, as is ufed to unload guns, and, twitting it about, 
drew out the birds. For a trifle I procured fome of 
them. When I firft had them, they feemed ttiff and 
lifelefs. I put one in my bofom, between my Ikin 
and fhirt, and laid another on a board, the fun Alin- 
ing full and warm upon it. One or two of my 
companions did the like. 
That in my bofom revived in about Jj. of an hour; 
feeling it move, I took it out to look at it, and faw 
SIR, 
Read t 
Sept. 7, 1762. 
N the latter end of March I took my 
paffaee down the Rhine to Rotter- 
1 
it 
