Spring Extension, Steel

Spherometer Laboratory • Brass dial head 40 mm diameter, mounted on stainless steel screw. • Head divided into 100 divisions, reading to 0.01 mm and registering on vertical scale 10-0-10. • Frame with three legs of stainless steel. • Distance between two legs is 40 mm approximately. • Pitch 1mm.

Polished brass, in hardwood case with hinged lid. Divided compartment with dust cover holds nickel-silver and aluminum fractions. With chrome plated brass forceps. Capacity 1 mg to 100gm. Capacity 1 mg to 200gm. Capacity 1 mg to 500gm. Capacity 1 mg to 1000gm. Capacity 1 mg to 2000gm.

Vernier Calipers Precision • Steel cadmium plated, improved pattern, double scale metric scale graduated to 150 mm. • Inches scale graduated to 6 inches provided with thumb movement for fine adjustment. • Individually packed in velvet lined box.

Screw Gauge Micrometer Demonstration • About 200 mm long, made of aluminum. • Black spray painted individually packed. • Measurements are approximate