PUBLIC PROFESSOR OF ECONOMY IN THE UNIVERSITY OF
GOTTINGEN.

TRANSLATED FROM THE GERMAN,

BY WILLIAM JOHNSTON.

SECOND EDITION,

CAREFULLY CORRECTED, AND ENLARGED BY A FOURTH VOLUME.

PRINTED FOR J. WALKER AND CO.; J. FAULDER; J. BOOKER;
B. AND R. CROSBY AND CO.; R. PRIESTLEY; R. SCHOLEY;
J. RICHARDSON; W. OTRIDGE; J. HARDING; T. HAMILTON;
AND J. BELL.

Printed by S. Hamilton, Weybridge, Surrey.

CONTENTS

OF

THE FIRST VOLUME.

ITALIAN Book-keeping

Odometer-Instrument for measuring roads

Machine for noting down music

Refining gold and silver ore by quicksilver

Dry gilding

Diving-bell

. 179.

. 195