423 
Scientific Intelligence. — Arts. 
ed by different colours, and provided with a contractive and ex- 
pansive power, occurs in no other beings of the animal kingdom, 
but in the tribes of the class Cephalopoda. 11. Lastly, this new 
organic system, which is remarkable, on account of its position, 
singular on account of its structure, and surprising by its phe- 
nomena, ought to be arranged by naturalists as a particular or- 
ganic system. Sangiovanni names this organ, on account of its 
phenomena, its power of expansion and contraction, and, lastly, 
its position, Systema cromofero-espansivo-dermoidale , and con- 
siders it as an organ of defence to the animals possessing it. 
Additional. — In Blainville’s Principes <P Anatomic Comparee , 
vol. i. p. 198, I find the organ above described, noticed in a very 
general way. The following are De Blainville's observations: 
u C'est. sur le peau d’un genre de cet ordre, celui des calmars, 
qui se voit un singularity cle coloration fort remarquable. Les 
taches colorees en rouge plus on moins vif dont elie est parsemee 
assez irregulierement, sont dans un sorte de mouvement de sys- 
tole et de diastole continue! ; c’est-a-dire que parvenues a toute 
Fetendue dont elles sont susceptibles, elles diminuent peu-a-peu 
jusqu’ a devenir presque imperceptibles, pour augmenter ensuite 
graduellement de nouveau, et ainsi de suite. 11 
ARTS. 
26. Cotton-Yarn Cotton-yarn has been spun of the fineness 
of 350 hanks weighing only one pound. Each hank would 
measure 840 yards, which multiplied by 350, will give 294,000 
yards, or 167 miles and a fraction. — HeywoodA Discourses 
27. Medical Remains found at Pompeii. — M. Choulant has 
lately published, at Leipsic, in a pamphlet, entitled De Locis 
Pompeianis ad Rem Medicam facientibus , an account of the dif- 
ferent objects relating to the medical art, which have been dis- 
covered at Pompeii. (The eruption of Vesuvius, under which 
the ancient city was buried, and in which the elder Pliny fell a 
victim to his ardour for the advancement of science, occurred about 
the seventy-ninth year of the Christian era). M. Choulant suc- 
cessively describes the Temple of Esculapius, the amulets, sur- 
gical instruments, pharmaceutical apparatus, &c., found in the 
midst of the ruins. Amongst the surgical instruments were 
* The above notice, and some others that follow, are selected from Mr Hey- 
wood’s interesting Discourses, delivered before the Royal Institution at Liverpool. 
