I am very glad you have drawn my attention prominently to the localising function in Drosera, as it is very likely I have been too keen in my scent after nerves; and I believe it is chiefly by comparing lines of work that in such novel phenomena truth is to be got at. And this reminds me of an observation which I think ought to be made on some of the excitable plants. It is a fact not generally known, even to professed physiologists, that if you pass a constant current through an excised muscle two or three times successively in the same direction, the responses to make and break become much more feeble than at first, so that unless you began with a strong current for the first of the series, you have to strengthen it for the third or fourth of the series in order to procure a contraction. But on now reversing the direction of the current, the muscle is tremendously excitable for the first stimulation, less so for the second, and so on. Now this rapidly exhausting effect of passing the current successively in the same direction, and the wonderful effect of reversing it, point, I believe, to something very fundamental in the constitution of muscular tissue. The complementary effects in question are quite as decided in the jelly-fish as in frog's muscle; so I think it would be very interesting to try the experiment on the contractile tissues of plants. But there are so many things to write about that I am afraid of 'bothering you,' and this with much more reason that you can have to be afraid of 'bothering' me. Aurelia is, as you say, 'a fine case,' and I often wish you could see the experiments. Very sincerely and most respectfully yours, GEO. J. ROMANES. The leading Physiologists felt the importance of co-operation and of alliance, and a society entitled the Physiological Society was formed of which Mr. Romanes and Professor Gerald Yeo were the first honorary secretaries. In 1876 Mr. Romanes made his first appearance at the British Association; he recounts his experiences in the following letter. _To Miss C. E. Romanes._ British Association, Glasgow: Monday, 1876. My dearest Puffin,--I have received all your letters, and had a good laugh over them; it is evident that I must get back soon to pilot the way. We shall indeed have a jolly time. I have just got out from the section room, and my work is over. I had a splendid audience both as to number and quality. When I had finished, all the great guns had their say, Professor Häckel leading off with a tremendous eulogium on the work, laying special stress on the great difficulty of conducting an inquiry of the kind, and complimenting me highly on the success obtained. Sanderson then made a long speech, and then Stirling and Balfour, &c.