216 Mr Livingstone‘’s Observations on a Chinese Lusus Natura. 
into an adjoining apartment, for the person who attends the 
work does not require the thermometer to direct him. 
With a larger apparatus of 200 pots, the thermometer differ- 
ed much from the preceding scale, which probably was caused 
by its not being perfectly free from air ; this, however, does not 
refute the accuracy of the above-mentioned results. A person 
may, at the first trial with each apparatus, immediately form a 
scale for himself. 
x\lthough this discovery has only been tried with Mr Groe- 
ning‘’s apparatus, it is nevertheless his opinion, that a proper 
application of the thermometer to an apparatus, of whatsoever 
construction, will give the same results. 
Aut, I Vi — Additional Observations on the Chinese Lusus Na- 
ture. By John Livingstone, Esq. Surgeon to the British 
Factory, China* Communicated by the Author 
C3n the l£lth and 20th of September 1821, I had full oppor- 
tunities of examining A-ke (now known by the name of A-gan), 
who appears to be a stout active young man, now seventeen 
years of age, and notwithstanding the incumbrance of his para- 
sitic brother, he is able to do the work of a husbandman ; but while 
he is at work, he is obliged to suspend his brother. The natural 
attachment of the parasite is from his sternum, m a line with his 
fourth rib ; it continues downwards to within about an inch of 
his umbilicus. The upper part consists of the four lower cer- 
vical vertebra, of which the spinous processes of the upper and 
two lower can be distinctly felt. The integuments extend quite 
smoothly from the chest of A-gan to the neck of his brother, 
and the subcutaneous bloodvessels appear of the natural size. 
The breadth of the upper part of this attachment does not ex- 
ceed two inches, and the connection of the parasite’s cervical 
vertebra, to the sternum of his brother, admits a little rotatory 
motion, from the point downwards, to within about an inch of 
A-gan’s umbilicus The attachment is formed by the integu- 
ments, which gradually become thinner, allowing a more exten- 
See this Journal, vol. V. p. 132, 
