In the addendum of the second edition of his Traité d'Horlogerie, Jean-André Lepaute, devotes four pages to this new construction. The solar time is easy to read and its mechanism, easy to repair and to adjust, but above ail, the principal advantage, specially for precision regulators, resides in the fact the motive force delivered to the escapement is almost not altered by the equation work additional frictions. Jean-Baptiste Lepaute called Le Jeune was born in 1727, one of the nine children of André Le Paute a blacksmith at Thonnelalong. In 1747 Jean-Baptiste moved to Paris to join his brother Jean-André in the clock-making business that he had begun in 1740. In Paris Jean-Baptiste devised a form of flat bed turret dock which was installed in the Palais Royal where it still is, and in 1754 the one wheel dock, of which an example is offered here, and of which a description was included in his brother's Traite d'Horlogerie, Paris, 1755. pp 139-46 . This dock is a development, 'almost as simple, and easier to make' of that made by Jean-André Lepaute at the request of Pierre Le Roy in early 1751, in itself probably stimulated by the simplified dock developed by Rivaz in 1740 but not published until 1751. Jean-André Lepaute's development of Le Roy's form led to some acrimony between the two eminent makers, although both were agreed that a further variation imagined by Mazurier was entirely worthless. In 1760 and 1763, the brothers Lepaute brought their nephews Pierre-Henry and Pierre-Bazile into their business. Jean-Baptiste paid special attention to public docks, building among others the equation dock for the Hôtel de Ville in Paris, which was burnt during the insurrection of the Commune in 1871. In 1789 Jean-Baptiste retired from the business. He died on 18 March 1802. 'ô','ô') In the addendum of the second edition of his Traité d’Horlogerie, Jean-André Lepaute, devotes four pages to this new construction. The solar time is easy to read and its mechanism, easy to repair and to adjust, but above ail, the principal advantage, specially for precision regulators, resides in the fact the motive force delivered to the escapement is almost not altered by the equation work additional frictions. Jean-Baptiste Lepaute called Le Jeune was born in 1727, one of the nine children of André Le Paute a blacksmith at Thonnelalong. In 1747 Jean-Baptiste moved to Paris to join his brother Jean-André in the clock-making business that he had begun in 1740. In Paris Jean-Baptiste devised a form of flat bed turret dock which was installed in the Palais Royal where it still is, and in 1754 the one wheel dock, of which an example is offered here, and of which a description was included in his brother’s Traite d’Horlogerie, Paris, 1755. pp 139-46 . This dock is a development, ‘almost as simple, and easier to make’ of that made by Jean-André Lepaute at the request of Pierre Le Roy in early 1751, in itself probably stimulated by the simplified dock developed by Rivaz in 1740 but not published until 1751. Jean-André Lepaute’s development of Le Roy’s form led to some acrimony between the two eminent makers, although both were agreed that a further variation imagined by Mazurier was entirely worthless. In 1760 and 1763, the brothers Lepaute brought their nephews Pierre-Henry and Pierre-Bazile into their business. Jean-Baptiste paid special attention to public docks, building among others the equation dock for the Hôtel de Ville in Paris, which was burnt during the insurrection of the Commune in 1871. In 1789 Jean-Baptiste retired from the business. He died on 18 March 1802.