19. With what declivity the Water runs out of the Euxine-Sea into the Propontis? With what depth? And if the many Tides and Eddies, so famous by the name of the Euripi, have any certain Period?
20. If in the Euxine-Sea there can be found any sign of the Caspian Seas emptying it self into it by a passage under ground? If there be any different Colour, or Temper as to Heat or Cold; or any Current or Motion in the Water, that may give light to it?
21. By what Inland passages they go to China; there being now a passage for Caravans throughout those places, that would formerly admit of no Correspondence by reason of the Barbarisme of the Inhabitants?
22. Whether in the Aquæducts, they make, they line the inside with as good Plaister, as the Ancients did? and how theirs is made?
23. To inquire after these excellent works of Antiquity, of which that Country is full, and which by the ignorant are not thought worth notice or preservation? And particularly, what is the bigness and structure of the Aquaeducts, made in several places about Constantinople by Solyman the Magnificent? &c.
An Observation of Optick Glasses made of Rock-Chrystal.
* It may be queried whether those were true Veins, or only Superficial Strictures, and slight scratches.
This is contained in a Letter of Eustachio Divini, Printed in Italian at Rome, as the 39. Journal des Scavans extracts it, vid.