From Carpenter's The Microscope and its Revelations, 1883

Swift's Portable Binocular. - Carrying still further an idea originally worked-out by Messrs. Powell and Lealand, Mr. Swift has devised a very complete Portable Binocular, which can be folded into a very small compass, without any screwing or unscrewing, and can be thus set up, as in Fig. 55 A, or packed away, as at Fig. 55 B, with great facility, when once the manner of doing so has been learned. Its construction is as marvel of ingenuity; while its workmanship is so excellent that its joints do not easily become loosened by wear, and can all be readily tightened when required. It is so-steady as to bear being worked (as a Monocular) with even high powers; but its great advantage consists in its suitability to the Traveler, who either wishes (as often happens to the Author) to display to scientific friends in other countries a set of objects that can be most advantageously seen by the Binocular under low powers, or to avail himself of opportunities of examining on the spot any interesting specimens he may meet with. The instrument also carries Mr. Swift's Combination Sub-stage (Fig. 85), which can be packed, together with three Objectives, Side-Condenser, and several other Accessories, into a Case only 11 inches long, 6 1/2 inches wide, and 3 1/2 inches deep, the whole weighing only 7 1/2 Ibs.