Nol. U1.] 
his works. In one of her letters fhe 
obferves: Newton has taken the firft 
ftep in philofophy, you the fecond. He 
alfo fhowed me: fome -very difficult que- 
ries propofed by the Empref{s concern- 
ing his Epoques de la Nature, with his 
an{wers to them. ( 
At length I was compelled to take my 
leave of this great and good man, bear- 
ing in my mind a deep and indelible im- 
preflion of all that I had feen and heard. 
~ recolleéted, at parting, the lines of — 
Voltaire, in his Cidipus, as applicable 
‘to my cafe. 
L Amitié dun grand homme eft un bienfait des 
dicux 5 
He lifois mon devoir, &F mon fort dans fes yeux, 

For the Monthly Magazine. 
MiIscELLANEOUS CALCULATIONS, 
RELATIVE TO MAN, AND OTHER 
ANIMALS. 
(From the German.) 
NATURAL HISTORY. 
A TABLE of the duration-of Life, in 
* certain animals: 


Years. 
The Cricket - = IO 
The Spider (fometimes more than) - x 
The S:orpion, generally (and fometimes 
“more than) - - “y 
The River Crayfifh - - 20 
“The Carp - - 100 to 150 
‘The Pike (fometimes more than’) - 40 
The Crocodile - - Co 
The Tortoife - = Ico 
The Hen ‘ ~ Se 10 
‘The Peacock - - 24 
Vhe Nightingale and Karle - 16 to 13 
The Canary; if it doesnot couple ——- 24 
if it breeds annually = 10 
The Sparrow-hawk - 40 
The Goofe = - fe) 
The Swan - - TOO 
The Eagle - - 100 
The Parrot - - 11@ 
The Rabbit, from - 8 to 9 
The Goat = - 10 
The Sheep - - 10 
The Hog - = = 20 
Mabe Gar suse - > 18 
The Squirrel = 7 
The Hare, from - = 7 to $ 
‘The Dog, from err Za EO, ia 
Tho Wolf ~ - 20 
The Bear - ~ - 20 
The Fox ” - 1s 
The Lion - - 60 
The Cow (fometimes more than) | ~ 20 
The Bull - = 30 
The Ox, employed in agriculture - 19 
The Deer a - 20 
The Horfe, from By = 25 to 30 
The Afs, from - - 25 to 50 
The Camel, from > = - 50 to 60 
The Elephant, from = 159 to 200 
MontHiy Mac. No. XIX. 
Compendium of Political Arithmetice 
sor 
Man.—Poriticat ARITHMETIC. 
Suppofing the earth peopled with. 
'3a0,000;000 inhabirants, end aliowing 
33 years for a generation, it has been 
computed, that the deaths of each year 
amount to = 30,060,600 
feach day, to - $2,135 
Of each hour, to ps 344257 
But as the number of deaths is to the 
number of births, as 10 to 12, there 
are born, every year, 26,000,c00 
Every day ~ - 95,569 
Every hour - S A)1073'¢ 
If mankind had not been doomed to 
die, there would have been, at prefent, 
about 173,000 billions of mortals on the 
earth ; and in this cafe, there would ftill 
have been g110 ‘quare feet of earth re- 
maining for each man. 
Reckoning only three generations dur- 
ing a century, and fuppofing, at ‘the 
{-me time, that the:world has only ex- 
ifted s700 years, there have been only 
171 generations from the creation to our 
own time, 124 fince the deluge, and 53 
fince the Chriftian-era: now, as no fa= 
mily in Europe can trace its origin to the 
time of Charlemagne, it follows, that the 
moft ancient houfes cannot reckon more 
than 30 generations, and very few, if 
any, can go fo far back; but fuppofing 
it to be the cafe, whatis this, but 1000 
years illuftration, againft 4,800 years of 
obfeurity ? 
On an equal fpace, where there exifts, 
In Iceland - x Man, 
There is in Norway - 2 
Sweden = 14 
TPUrey ye 36 
Poland - ‘52 
Spain - 63 
Jreland q 99 
Switze:land - Tig 
Great- Britain - 1Ig 
‘Germany - 127 
England - 152 
France - 153 
Italy - 17z 
Wap'es - EOz 
Venice = 196 
Holland - - 224 
And in Malta - 1,103 
Out of every thoufand men, 28 die 
off annually. ug 
The number of inhabitants of a city 
or country, is renewed nearly every 
thirty years. 
Of 200 children, no more than one 
dies in the birth. — 
Of 100, one does not die during the 
mother’s lying-in- 
Of r1ooo infants, fed by means of the 
mother’s milk, not above 300 die; but 
of the fame number reared by wet 
Zeke. nurfes, 
