LAB. EQUIPMENTS

33 (a) CALCITE / QUARTS PRISMS EQUILATERAL

With Optics axis parallel to refracting edge.
size 12.5 x 12.5 mm. 15 x 15 mm. 18 x 18 mm. 25 x 25 mm.
(b) with optics axis parallel to base when adjusted to minimum deviation
size
12.5 x 12.5 mm. 15 x 15 mm. 18 x 18 mm. 25 x 25 mm.

34. Fresnel's Bi-Prisms optically worked made from crown glass.

size 40 x 30 mm.
size 50 x 40 mm.

35. Reflector for student microscope mounted in metal frame 48 mm. black painted regular quality without holder.

36. Reflector for microscope mounted in back anodized frame 50 mm.  with optically true mirrors best silvered superior quality without holder clamp for Reflector

37. Condenser Lenses for Microscope (only Lenses)

(a) Front optical glass highly polished with ball 15 mm.
(b) Front optical glass highly polished with ball 19 mm.

38. (a) Lens for Newton's Ring Set consisting of one flat glass & one  plano- convex lens of 200cm.F.L. made from extra white glass  (lenses only)
50 mm 60 mm 75 mm
(b) Made from plate glass slight Greenish Tint.
50 mm 60 mm 75mm
(c) Newton's Ring Apparatus Complete , green glass
60 mm
(d) Newton's Ring Apparatus Complete , White glass
60 mm

39. Plane Diffraction Grating .

(a) Transmission Type 30 x 25 mm.available 15000 lines per inch Plate covered with mounted in plastic frame
(b) Plane Diffraction Grating School quality 25 x 30 mm. 13400  lines per inch mounted in plastic frame
(c) Transmission (Hilger and Wall Type) 38 x 50 mm. available 15000 lines , 7500 lines , 2500 lines per inch . Replica on glass plate covered with another glass plate

40. Polaroid Disc
Mounted 50 mm. size

41. Llyods Mirror Mounted

42. Ocular Micrometer
1/10 mm.

43. Stage Micrometer on glass slide 0.01 mm.

44. Glass Slide : For Microscope
size Thickness
75 x 25 mm. 1.5 mm.
75 x 25 mm. 2.0 mm.