( ) 
Now a§ we find, that Inch a Quantity of Particles 
is feparated from the Hands, and is daily renewed in a 
well conftituted Body ; we muft conclude, that we 
eat leveral of the laid rubb’d off Particles in oui' 
Bread, and that they turn to Nourifliment ; and 
I am of Opinion, that there is hardly any Food pre- 
pared for us, elpecially liich as palles pretty much 
thro’ the Hands, but that fome of the rubb’d off Par- 
ticles are mix’d therewith, efpecially when they knead 
Dough from Meal or Flower ; and Hill more, when the 
Bakers knead with their Feet, as in making of Rye- 
Bread. 
Since thele Oblervations concerning the Fridiioii or 
rubbing of my Hands, I take more notice thereof, 
when I walh and dry them, than formerly ; and I Hand 
amazed at the numerous Particles that daily leparate 
themfelves from my Hands, and grow on them again ; 
and at the particular Provifion, that is made for pro- 
ducing thele Particles, in the Palms of our Hands and 
Bottom of our Feet, whereas we do not by far meet 
with fuch a Quantity of Particles conllantly prodnced 
in otlier Parts of our Body ; for if we obferve thole, 
who work much with the back of their Hands, we lhall 
not meet with any of that hard Skin we have been 
Ipeaking of, but only a kind of Tumor, .or rifing, as 
the Dry-llieerers, or thofe who drefs Cloth, have upon 
their left Hands. 
In lliort, the Manner of the Produdion of thele 
fmall Particles will be a Myftery to us, though our 
Hands and Feet mull be fortified with fuch a Matter, 
to enable them to fupport all that Force, and Prellure 
which they are obliged to undergo. 
fDelft, July 7. 
1711. 
D d z 
III. Dc 
