550 PHILOSOPHICAL TRANSACTIONS. [aNNO 1732. 



fits. These observations should be continued for some time, both in a settled 

 season, when the feeding-stream at o cannot change, and in variety of seasons, 

 when the said stream may be altered. 



Mr. Atwell concludes, by presenting to view an artificial fountain of this 

 kind. fig. 14, which being very easily made, may be buried in the bottom or 

 slope of a terras, where a constant stream of water can be brought, and will 

 furnish us with a new sort of water-works in gardens. The two reservoirs 

 ABCD, EFGH, with their syphons mnp, stv, and the third reservoir ikkl, with 

 its outlet X, are included in a box yyyy. Into this box at a enters a funnel 

 r^r divided within the box into two pipes, viz. ao, which serves for a feeding- 

 stream to the great reservoir, and AW, which serves for a constant stream to 

 the third reservoir. A stream of water being let into the funnel T>S, will dis- 

 charge itself like such an intermitting reciprocating fountain at x, where tliere 

 is a basin yzzz without the box to receive it; with an outlet c, and a diagonal 

 gage ZY, to mark the rise and fall of the water in the basin. 



Eclipses of Jupiter's Satellites observed at Pekin in \TAO, 1731 ; luith so?ne other 

 Astronomical Observations made there. Bij F. I. Koegler and Fereira. 

 N° 424, p. 3l6. 



A Catalogue of Eclipses of Jupiter's Satellites Jor the Year 1733. By James 

 Hodgson, F. R. S. Mathematical Master at Christ's Hospital. N° 424, p. 321. 



Precalculated, and proposed for observation in that year. 



Experiments to prove the Existence of a Fluid in the Nerves. By Alexander 

 Stuart, M. D. F. R. S. &c. N" 424, p. 327. 



Exper. 1. — Dr. Stuart suspended a frog by the fore legs in a frame, leaving 

 the inferior parts loose,- then the head being cut ofF with a pair of scissars, he 

 made a slight push perpendicularly downwards, on the uppermost extremity of 

 the medulla spinalis, in the upper vertebra, with the button-end of the probe, 

 filed flat and smooth for that purpose; by which all the inferior parts were in- 

 stantaneously brought into the fullest and strongest contraction. This he re- 

 peated several times, on the same frog, with equul success; intermitting a few 

 seconds of time between the pushes, which, if repeated too quick, made the 

 contractions much slighter. 



Exper. 2. — With tiie same flat button-end of the probe, he pushed slightly 

 towards the brain in the head, on that end of the medulla oblongata appearing 

 in the occipital hole of the skull; on which the eyes were convulseil. This 

 also he repeated several times, on the same head, with the same effect. 



