UFFENBACH 63 
which appear to them undiscernible. But as to the 
matter of fact he relates, I dare answer for his sincerity, 
having myself tried his Microscopes, viewed several things 
through them, and found them conformable to his relations. 
Besides, he is very free to let Objects be viewed through 
his Glasses, and to communicate his Observations to 
Gentlemen of Learning and Credit, especially Travellers: 
but he has made so many of them at all seasons and times 
of the year, that the Thousandth part cannot be examined 
by those that repair to him on that account. ‘There is a 
Volume of his Observations printed in Latin, some of 
which are inserted in the Philosophical Transactions, and 
I have by me some other’ very curious, which I shall 
publish in due time.’ 
The last important contemporary record is Uffenbach’s® 
well-known account of his visit to Leeuwenhoek in 1710. It is 
entertaining enough; but chiefly because of the fatuous com- 
ments of this complacent German diarist, who was so satisfied 
of his own superiority that he would be horrified if he could 
hear that his condescending notes on our poor Dutch draper 
are now the chief thing of interest in his tedious memoirs. 
This is what he wrote: * 
On the 4th December [1710] we’ went in the morning 
* From other references, it appears that de la Crose possessed a copy of 
the Dutch edition of L.’s letters of that period. 
* A few further observations on the circulation of the blood were published 
by de la Crose, but nothing else. 
* Zacharias Conrad von Uffenbach (1683-1734) was a German jurist, 
town-councillor of Frankfort, and a keen collector of books, coins, and 
“curiosities”. His Travels were published posthumously in 1753-54 (ed. 
Schelhorn), and much of his insignificant correspondence has also appeared 
in print. His life is prefixed to his memoirs, and will also be found in the 
Allg. Dtsch. Biogr. 
* Translated from the German of Uffenbach (1754), Vol. ITT, pp. 349-360, 
with immaterial omissions which are duly indicated. The full description 
is too long-winded to give here in its entirety. In my translation I have 
left the Latin words as Uffenbach gave them, in order to preserve his 
pedantic style of expression. His mistakes are too evident for comment. 
° “We” apparently denotes Uffenbach and his brother. 
