US$ 39.95
Used to determine irregular-object volumes by water displacement
Continuously motor-driven to supply a steady high-voltage source
the larger working face giving longer beam paths for measurable lateral-displacement studies
5 ratio favoring intense convergence demos and short-throw real-image formation work
Jolly's Photometer Build to Order Used to determine irregular-object volumesBrightness comparing Jolly's photometer using a translucent paraffin disc method, the balanced position locating the photometric midpoint between two unequal light sources.
US$ 39.95
US$ 739.50
US$ 247.50
US$ 100.00
US$ 85.00
US$ 120.00
US$ 39.95
US$ 281.25
US$ 133.50