The following description was prepared by William Gross:
Et Ketz, calculations and gematriot on matters of the future redemption, by Yechacham – Rabbi Yitzchak Chaim HaCohen of the Kantorini Chazanim. Amsterdam, 1710. Printed by Shlomo Proops. Single edition. Engraved illustration of the sacrifice of Isaac on the first page. Rabbi Yitzchak Chaim HaCohen of the Kantorini Chazanim (1644-1723, Otzar HaRabbanim 10658), a Torah scholar and physician, Rabbi of Padua. Taught the Ramchal and authored many compositions. This book deals with various calculation and proves that the time of redemption has already begun: The first time has already arrived, there is a middle time in which apparently the Mashiach will be born – this is 1710 (the time the book was printed), and the last and real time in which the redemption will arrive will be 30 years later – in 1740. This composition greatly impacted the messianic hopes and expectations for the Redemption in those years. For information about the book see: Shneur Zalman Shazar, "The Hope of the year 1740", inside: Orei Dorot, Jerusalem 1971, Part 1, pp. 127-153.
A book on messianic ideas and the concept of redemption. The volume is well known for its engraved frontispiece showing the Akedah (the Binding - and redemption – of Isaac).
The frontispiece also relates to the name of the work’s author, Yitzhak Chaim Kohen Min ha-chazanim (the YeCHKam), one of the Paduan physician-poets who had some influence upon young Moses Chaim Luzzatto.
The press set up by Solomon Proops became the most famous of all the presses operating in Amsterdam in the 18th century, apart from the Menasseh ben Israel press. Solomon's father Joseph came to Amsterdam from Poznan. Solomon Proops was initially involved in the bookselling trade, and in 1677 was admitted to the Amsterdam Guild of Booksellers, Printers and Bookbinders. In 1704 he set up his own press, which was to become the longest operating and most productive of all the Jewish presses in Europe in the 18th C. He acquired the fame of a printer who produced beautiful books that could be bought at a reasonable price.
The Proops family was involved in the printing of Hebrew books in Amsterdam from the beginning of the 18th century. As the longest lasting such printing house in that city over generations, their publications spanned more than 150 years.
, 72 leaves.