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Doc. 205.] 23
SWEDENBORG’S TRAVELS IN 1733.
June 22 (July 3) . I read through a book of John Ber
nouilli, which bears the title: Essai d’une nouvelle théorie de
la manœuvre des vaisseaux, &c. [ Essay concerning a new theory
of handling ships], which treats geometrically of the structure
of vessels, &c. 1. The action of fluids upon the surface of
the bodies which they meet ; 2. The track and the movement
of a ship which has the form of a parallelogram ; 3. The
swiftness of a rectangular ship ; 4. The position of the sails
and the form of the beam which occupies the lowest part of
a ship and is called the keel ; what its form must be, that it
may produce the best effect ; 5. The position of the rudder,
that it may turn the ship most quickly; 6. The course of a
ship representing the figure of a rhomb ; 7. The swiftness of
a ship representing the figure of a rhomb; 8. The same in
respect to the lowest beam or the keel ; 9. The motion of
curved or curvilinear bodies in fluids ; 10. Application of the
foregoing theory to certain ships ; 11. Directions how to con
struct tables for the course of ships, respect being had to the
lowest curvature (belly) of the ship ; 12. The most convenient
place for the masts ; 13. The axis and the centre of resist
ance of the water; 14. The inflation and curvature of sails ;
15. The axis and the equilibrium of the wind impinging upon
the sails. Two letters follow directed to M. Renau, with
his reply.
Afterwards I perused Julius Bernhard von Rohr’s Com
pendieuse Haushaltungs-Bibliothek (Compendious library of
household matters), for 1726, in 8vo. This work treats in
general : 1. Of the study of economy; 2. Of the revenue
system, (von dem Cameralwesen); 3. Of private household
economy and of economy for the farm and field, (von der
Privatwirthschaftskunst, Land- und Feld- Oeconomie); 4. Of
agriculture, (vom Ackerbau); 5. Of vine culture, (vom Wein
bau); 6. Of brewing, (vom Bierbrauen); 7. Of the art of
cooking and baking, (von der Kochkunst und Confituren);
8. Of gardening , (von der Gärtnerei) ; 9. Of woods
and hunting, (von den Wäldern und der Jägerei) ; 10. Of
ponds and fishing, (von Teichen und Fischereien) ; 11. Of
cattle breeding, (von der Viehzucht) ; 12. Of mining and
the mineral kingdom, (von Bergwerkssachen und dem minera
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