GRAHAM’S CATALOGUE CONTINUED. 
653 
356. Prenanthes sarmentosus. 
357. Quisqualis Indica. Iji gardens. 
358. Bhizophora Mangle. 
359. Rosa. } Several specitss in gardens. 
360. Ricinus communis. 
361. Ruellia Zeylonica. 
362. Rottleria tinctoria. 
363. Saccharura officinarum. Cultivated. 
364. Smilax aspera. 
365. Santalum album. 
366. Solanum tuberosum. 
367. ” lycopersisum, 
368. ” melongina. 
369. ” nigrum. 
370. ” jacquini. 
371. Sterpulia colorata. 
372. ” urens. 
373. ” foetida. Poon tree. Grows 
to a great height in Malabar ; masts are 
made of it. 
374. Sphaeranthus Indicus. 
275, Sansevcera Zeylonica. 
376. Sapindus emarginatus. 
” tetraphyllus. 
377. Spondias Amra. 
378. Sesamum Indicum. 
379. Sida populifolia. 
380. Smithia sensitive. 
381. Spilanthes 
382. Salvadora persica. 
383. Stemodia 
384. Tectona gmndis. Teak tree, 
385. Tamarix Indica. 
386. Turnera ulmifolia. In gardens. 
387. Tradescantia discolor. Ditto. 
388. Tradescantia cristata. 
389. ,, annua. 
390. Thunbergia grandijlora. In gardens. 
391. Taraarindns Indica. 
392. Tagites patula. In gardens ; vjovxx 
by native women in their hair. 
393. Trichosanthes Anguina. 
394. Trophis aspera. 
395. Terminalia Catappa, 
396. ,, alata. 
397. ,, Bellirica. 
398. Tabernaemontana dicZioZoma. 
399. Utricularia stellaris. 
400. Ulmus integrifolia. Salsette. 
401. Vnona longifolia. 
402. Vitis vinifera. In gardens. 
403. Vitex trifolia. 
404. Vernonia arborea. 
405. Vernonia anthelmintica. 
406. Verbena saliva. 
407. )» dicJiotoma, 
408. Viscum compressum, 
409. Vangueria spinosa. 
410. ,, edulis. 
411. Titmaama elliptica. 
412. Yucca gloriosa. 
413. Zingiber o^cZnaZe. 
414. Ziziphus Jujuba. 
415. Zinnia elegans. In gardens only, 
416. Zea Mays. Indian corn ; extensively 
cultivated. 
417. Zapania nod^om. 
Records of Science. 
ON SOME METHODS OF ASTRONOMICAL OBSERVATION. 
By William Galbraith, A. M. 
Teacher of Mathematics, Edinburgh. 
{Continued from page 586.^ 
All the formulae* vrith which I am acquainted, and most of the tables are adapted to 
the sun’s distance from the solstice reckoned on the ecliptic, or the difference between 
the sun’s longitude, at the time of observation, and 90° or 270°. Now, by those possess- 
ing an ephemeris giving the sun’s longitude at apparent noon, with differences to reduce 
to any given meridian, this is readily found. The sun’s longitude, however, in the new 
Nautical Almanac for 1834, and succeeding years, is given to mean noon without dif- 
ferences or proportional parts, consequently, the distance of the sun, at apparent noon, 
from the solstice is not so easily obtained in terms of the longitude, as in those of the 
right ascension. Besides, in an observatory, the sidereal time is generally known by 
observation, and, therefore, on the whole, arguments depending on the right ascension 
are the more convenient for obtaining the reduction of the sun’s observed declination 
to the solstice. 
A very convenient formula for this purpose may be obtained in terms of the right 
ascension as follows : 
Let & be the right ascension at the time of observation, $ the declination, w the 
obliquity of the ecliptic, and x the connexion necessary to reduce the observed decli- 
nation to the solstice. 
♦ There are, ! have since found, formulse, though stiil requiring simplification, in 
works on Astronomy for this purpose, and not free from obliquity. 
