438 



KNOWLEDGE. 



November, 1910. 



already described, one found that, as soon as the 

 form had obtained flagella, and had acquired a size 

 of about one-third that of the megazooid, the nucleus 

 became more \'isible than usuah and. if specially 

 and carefully looked for, a slight constriction was 

 noticed to be forming round the body, which 

 gradually deepened in the manner I have already 

 stated. A rather striking fact in regard to this 

 monad is that both methods of reproduction are 



very slow, the organism not multiph-ing at all 

 rapidK'. At first I found it extremely difficult to 

 keep the organisms for any length of time, but since 

 found that they grew very well in an infusion of 

 grass to which a small (]uantit\' of the solutions 

 recommended b\' Dr. \'an Huerck for growing 

 Diatoms had been added. On account of its cannibal 

 propensities I have named the organism Moiias 

 ttarcoplmga. 



SOLAR DISTURBANCES DURING SEPTEMBER, 1910. 

 By FRANIv C. DENNETT. 



During September there was quite a revi\al of Solar energy, 

 yet the days between the 14th and 17th yielded only faculae or 

 bright spots. The longitude of the central meridian at noon 

 on September 1st was 103°' 19. 



No. 63 of the .August list remained on the disc until 

 September 11th. and is therefore shown on the present chart. 



No. 6ia. — A pore a little north of No. 63. only seen on 8th. 



No. 64. — A solitary pore on the 1st, but by the 3rd had 

 increased toagroup 40,000 miles in length, the western spotlets 

 being the largest. The 5th found other spotlets enlarged, and 

 on the 6th there was a great spot 22,000 miles across close to 

 limb. 



No. 65. — Two spots appeared on the 7th, 58,000 miles apart, 

 in the area of No. 61. The western one, 7,000 miles in 

 diameter, had its penumbra fringed brightly at the inner edge 

 on the 8th and 9th. but was reduced to two pores on the 10th. 

 but only one seen on the 11th and 12th. The eastern spotlet 

 dwindled to a pair of pores on the 8th, one remaining until the 

 10th. A group of three tiny dots appeared on the 13th. hut 

 soon died away. Situated longitude 297°, South latitude 1 2°. 



No. 66. — A minute pair ot pores only seen on the 18th. 



No. 67, 67a. and 676. — A series of disturbances close 

 together. On the ISth and 19th only one pore seen amid 

 faculae, but two on the 20th, 22,000 miles apart. This was 

 replaced in the afternoon by a new group of eight pores and a 

 leader 7,000 miles in diameter. The configuration of the 

 group had changed on the 21st. and next day there was only 

 one pore with a gray marking near by. On the 23rd there was 

 another new group 48,000 miles in length, b, which on the 24th 

 was markedly of an elliptical shape. The western spot had 

 the form of an arrow head. 12.000 miles in diameter. 

 Dwindling on the 26th, only two pores were left on the 27th, 

 and one until the 2Sth, the area being marked after with 

 faculae. 



No. 68. — An active faculic area on the ISth showing three 

 tiny pores, one remaining until the 19th, but only a dull 

 marking on the 20th. A pore showed nearer the eciuator on the 

 21st, whilst on the 22nd two others 20,000 miles apart 

 appeared within one degree of the equinoctial line. There was 



a pair of tiny pores in the same region on the 23rd. when last 

 observed. 



No. 59. — (.)n the 19th. a group of pores and spotlets, 

 22,000 miles in length, increasing to 40,000 miles by the 21st, 

 when composed of only two spotlets, only one grayish pore 

 continuing until the 22nd. 



No. 70. — The return of No. 64 on the 20th, still 22,000 miles 

 in diameter. The bridges and jets on to the umbrae were 

 interesting. The inner border of the penumbra brightly 

 fringed from the 21st to the 23rd and on to the 30th. Three 

 pores appeared west on the 25th. and others east and north on 

 the 24th, 26th and 27th. Seen until nearly close to limb or 

 edge on October 3rd. 



No. 70a. — .\ double spot east of the spot on the 22nd, seen 

 single until the 26th, though a pore showed 20,000 miles north 

 of a on the 24th. 



Xo. 71. — On the 23rd. at iirst two pores showed, but later 

 in day the number increased ; only one continued until the 24th. 

 On the 26th, there was a little group of pores in front of a 

 region of faculae, 150,000 miles in length, last seen on the 27th. 



No. 71(r. — Two pores a little south of No. 71, 27th to 29th. 



No. 72. — What appeared as a single spot seen just on the 

 disc on the 23rd. proved to be two seen 24th to 28th; then the 

 western spotlet became shaped like a harpoon head. This, 

 however, did not last, but a group of four pores, 22,000 miles 

 long, continued until October 3rd. after which the area was 

 marked by faculae. 



No. 73. — On the 26th, pores had come on disc in a faculic 

 area — by the 27th it was evidently the forerunner of a large 

 group. This proved to be 140.000 miles in length, and to be 

 very deficient in umbra. As is usual in such cases, detail 

 changed considerably. The largest member was at one time 

 over 36,000 miles in diameter. The group covers the site of 

 Nos. 63 and 60, seen until October 9th. 



No. 74. — Amongst a bright faculic disturbance close to the 

 limb, a black spot showed on the 2Sth, not, however, seen since. 



The chart is constructed from the combined observations 

 of Messrs. J. McHarg, A. A. Buss, E. E. Peacock, and 

 F. C. Dennett. 



D.W ol' SEPTEMBER. 



10 ?0 50 «} 50 60 70 80 90 100 110 120 130 IW 150 160 170 ISO 190 200 210 ?20 230 240 250 260 270 280 290 jOo 510 520 550 5+0 S50 360 



