mproved; and the very means chosen for
terminating life became instead his salvation, restoring to perfect
health. Again, Dr. Peter Hood[13] relates that a blacksmith residing in
the neighborhood of his country house was in high repute for miles
about by reason of his cures of rabies. His remedy consisted simply in
forcing the person bitten to accompany him in a rapid walk or trot for
twenty miles or more, after which he administered copious draughts of
a hot decoction of broom tops, as much for its moral effect as for its
value in sustaining and prolonging established diaphoresis.

[Footnote 11: Wild Sports or the West.]

[Footnote 12: _L'Union Medicale_--name withheld by request of the
gentleman.]

[Footnote 13: London _Lancet_.]

Though the pathological conditions of hydrophobia and serpent
poisoning are by no means parallel, the _rationale_ of the methods
employed in opening the emunctories of the skin are the same; and were
it not for its powerful protracting effect and depressing action upon
the heart, we might perhaps secure valuable aid from jaborandi
(_pilocarpus_), since it stimulates profusely all the secretions; as
it is, more is to be hoped for in the former disorder than in the
latter. It would be desirable also to know what influence the Turkish
bath might exert, and it would seem worthy at least of trial.

* * * * *

TO FIND THE TIME OF TWILIGHT.

_To the Editor of the Scientific American_:

Given latitude N. 40 deg. 51', declination N. 20 deg. 25', sun 18 deg. below the
horizon. To find the time of twilight at that place. In the
accompanying diagram, E Q = equinoctial, D D = parallel of
declination, Z S N a vertical circle, H O = the horizon, P = North
pole, Z = zenith, and S = the sun, 18 deg. below the horizon, H O,
measured on a vertical circle. It is seen that we have here given us
the three sides of a spherical triangle, viz., the co-latitude 49 deg. 9',
the co declination 69 deg. 35', and the zenith distance 108 deg., with which
to compute the angle Z P S. This angle is found to be 139 deg. 16' 5.6".
Dividing this by 15 we have 9 h. 16 m. 24.4 s., from noon to the
beginning or termination of twilight. Now, in the given latitude and
declination, the sun's center coincides with the horizon at sunset
(allowance being made for refraction), at 7 h. 18 m. 29.3 s. from
apparent noon. Then if we subtract 7 h. 18 m. 29.3 s. from 9 h. 16 m.
24.4 s., w