574 PHILOSOPHICAL TRANSACTIONS. [aNNO 177Q. 



Tranquebar, and Cape Comorin. It flowers and fruits twice a year, during the 

 first eight months. The stem, is arboreous, upright, the thickness of a man, 

 five fathoms and more in height : the branches aUernate, spreading ; branchlels 

 alternate, again ramified, and hirsute with long pile. Leaves alternate, foot- 

 stalked, ovate-oblong, obtuse with an obtuse point, obscurely serrated, un- 

 divided, nerved : above of a bright green, very smooth ; beneath paler, and 

 bristled with stiff hairs, spreading, and a span long : the younger ones are evi- 

 dently toothed, the teeth vanishing as the leaves become full-grown : footstalk 

 subtriquetrous, smooth, and an inch long : stipules as in the former. Some- 

 times, but rarely, one or two leaves are cut or lobed : ihe flowers are male and 

 female distinct, on the same bough, or same part of the stem : footstalk simple, 

 or branched, pendulous, an inch long, and a foot thick : stalklets three, five, or 

 more, about a finger's length and thickness. — Spadix size of a finger, upright, 

 spreading. — Pericarp of vast size, weighing thirty pounds and upwards, fertile, 

 and constituting by far the largest of all known berries. — Seeds thrice and four 

 times the size of almonds, often two or three hundred in number, ovate-oblong 

 with one extremity acute, the other obtuse, and the sides a little flattened. 



Observations relative to both species. — The whole vegetable, both in branches 

 and fruit, abounds with a white, milky, tenaciousjuice, which cannot be washed 

 away without oil. The outside crust of the fruit is coriaceous, and every 

 where muricated with tubercles : this crust being removed, the seeds come in 

 view, which are involved or inclosed in flesh, and intermixed with various integu- 

 ments. The fruit of both species when ripe, is of a somewhat disagreeable or 

 nauseous smell, though delicate within. 



The S. macrocarpon is piopagated by seeds, which readily grow ; but the 

 S. incisum, which is sterile, is propagated by the roots, planted immediately 

 under the surface of the ground. 



It should be added, the now established name of this genus is Artocarpus. 



XXXI. A Second Paper concerning some Baroinetrical Measures in the Mines 

 of the Hartz. By Mr. J. A. De Luc, F. R.S. From the French, p. 48b. 

 Combining his first observations, Mr. De Luc found that the George gallery 

 was 127.15 lachters, or Hartz fathoms, below the entrance of the mine; and 

 that the whole depth was 215.86 lachters, which makes 801 English feet for 

 the first depth, and 133g for the latter. Mr. Uslar, having taken a memoran- 

 dum of the places where the above observations were made, determined the 

 correspondent geometrical measures. The depth of the George gallery he 

 found to be 127.87 lachters, that is, only 4 feet more than had been found by 

 the barometer ; and the whole depth was only 21 5-l lachters ; or 2 feet less than 

 that which resulted from his observations. Thus the barometric measurement 



