Notes and Memoranda. 385 



chiefly under the influence of the cerehrum ; the posterior of the cerebellum. 

 Cerebellar movements are apt to be habitual, while cerebral are impulsive. The 

 cerebellum acts when the cerebrum is removed, though when both organs exist it 

 is under its control. — Proc. Roy. Soc, No. 63. 



Toning- Bath toe Albumen Peocess. — In reply to one of our corres- 

 pondents, who has requested us to give a good formula for a toning bath, we 

 select the following out of a great number at present in use, as, in ordinary 

 circumstances, among the most convenient and effective, Place one litre of dis- 

 tilled water, and then two grammes of chloride of gold in No. 1 — a bottle with a 

 cork : one litre of distilled water, and then twenty grammes chloride of lime in 

 No. 2 — a bottle with a ground-glass stopper : one litre of distilled water, and 

 then five grammes of common salt, in No. 3 — a bottle with a cork. All the 

 chloride of lime will not be dissolved ; but what remains at the bottom of the 

 bottle will keep the fluid saturated, which is necessary : — before being used the 

 required quantity of it must be filtered. The toning bath is made as follows : — 

 To one litre of distilled water is added 60cc of the fluid in bottle No. 1, 20cc of 

 that in No. 2, and 15cc of that in No. 3. The mixture should be limpid, and 

 either colourless or of a light yellow tinge. It must be used at once, as it will 

 not keep. According to the time during which the proofs are immersed in it, the 

 shade will vary from some tint of blue to a deep black : a dark violet being pro- 

 duced in moderate weather in about twenty minutes — in cold weather a longer 

 time will be required. The whites will be beautifully bleached by the free 

 chlorine. A litre of this mixture will tone about 70 cartes de visite. They 

 must be moved about in it, and occasionally taken out, and replaced. The 

 quantity required for any number of proofs of any size may be easily calculated. 



Eaethquake in Sussex. — On the 30th April a shock was felt in several 

 places in Sussex, Lewes included. The strongest effect is reported to have been 

 felt at Chailey. A lady at Lewes heard a noise like hail shortly after midnight 

 (31st). At Fletching the people supposed a gunpowder explosion had occurred, j 



Conical Hail. — M. J. A. Barral describes to the French Academy some 

 hailstones that fell in Paris on the 29th March, 1864. They were of conical 

 shape, slightly concave at the base, and fell point downwards. The cones were 

 eight or ten millimetres in diameter at the base, and ten to thirteen millimetres 

 high. They seemed to be formed by the adhesion of small pyramids, leaving a 

 little hollow inside. 



Geeat Ceocodile oe the Oolite. — M. A. Valenciennes exhibited to the 

 French Academy on the 11th April a fossil crocodile tooth found iu the Oolite, 

 near Poitiers. Prom its size he estimated the animal to have been one hundred 

 feet long. This creature must not be confounded with the megalosaurus. 



Compabing the Light of Staes. — In Comptes Rendus for the 11th April 

 M. Chacornac describes a method of mounting a plane mirror so as to bring into 

 the field of a telescope the image of one star, while the telescope receives directly 

 the light of another. By this means the two images are brought into simul- 

 taneous view, the one of course less brilliant than it should be, through loss of 

 light in reflection. He gives the calculations necessary to work out the comparison. 

 Sirius he finds to be five times as bright as Arcturus. He is able to work by this 

 method upon stars from 20° to 160° apart. When seen simultaneously, Arcturus 

 looks orange red, and Sirius has a slight green tint. 



The Moth oe the Oedeal Bean — Insensibility to Poison.— Dr. Fraser 

 shows in the Annals of Natural History that the caterpillar of Deiopeia pulchella 

 can eat the poisonous ordeal bean of Calabar with impunity, and is in the habit 

 of boring holes in it. This caterpillar is readily killed with hydrocyanic acid, 

 while the Anthonomas druparum can live upon the kernel of the Primus cerasus 

 that contains it. 



Grafting Animals. — Dr. Paul Bert has published a work on the curious 

 subject of animal grafts. He succeeded in making Siamese twins of a couple of 

 rats, and in many other monstrosities. He exclaims, " it is a surprising spectacle 

 to see a paw cut from one rat live, grow, finish its ossification, and regenerate its 



