4a. =Large Microscope=, of smaller size than Stand I, fitted with horseshoe foot. The stand is inclinable and fitted with revolving centering stage, coarse adjustment by rack and pinion, fine adjustment by micrometer screw with scale. Draw-tube with millimetre scale. Large Illuminating Apparatus (Cf. p. 22, b) with rack and pinion, and iris-diaphragm with oblique movement. The cylinder-diaphragm and condenser may be readily substituted for one another. Triple nose-piece. Objectives 2, 4, 6, Oil-Immersion 1/12, N. A. 1,30. Eye-pieces I, III, IV, V. Magnifications 33-1300 =160.--= 4b. =The same= with Illuminating Apparatus. Triple nose-piece. Objectives 3, 6, Oil-Immersion 1/12, N. A. 1,30. Eye-pieces I, III, IV. Magnifications 60-1000 =148.--= 4c. =The same= with Illuminating Apparatus. Triple nose-piece. Objectives 3, 6, Oil-Immersion 1/10, N. A. 1,30. Eye-pieces II and IV. Magnifications 70-730 =136.--= =Stand= with Illuminating Apparatus, but without objectives, eye-pieces and nose-piece =76.--= =The same= with Illuminating Apparatus, Swing-out Condenser and Cylinder Iris-diaphragm (p. 20, a) =82.--= Mechanical stage No. 98 can be fitted to this stand; price =28.--= [Illustration: Stand Ia with English foot.] =Stand Ia= with English foot. 4d. =Large Microscope= differing from the foregoing (Ia) stand only in being provided with an English foot, which makes the stand somewhat steadier and lighter. The prices and combinations are otherwise the same. Dr. P. G. Unna of Hamburg uses this microscope in his laboratory. The stage revolves and centres. The illuminating apparatus is that described on p. 22, b. Triple nose-piece. Objectives 2, 4, 6, Oil-Immersion 1/12, N. A. 1,30. Eye-pieces I, III, IV, V. Magnifications 33—1300 =160.--= 4e. =The same= with the illuminating apparatus. Triple nose-piece. Objectives 3, 6, Oil-Immersion 1/12, N. A. 1,30. Eye-pieces I, III, IV. Magnifications 60—1000 =148.--= 4f. =The same= with illuminating apparatus. Triple nose-piece. Objectives 3, 6, Oil-Immersion 1/10, N. A. 1,30. Eye-pieces II, IV. Magnifications 70—730 =136.--= =The stand= with illuminating apparatus, but without objectives, oculars and nose-piece =76.--= =The stand= with swing-out condenser (p. 20, a) =82.--=