Lab Techniques


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A Broken Glass Tool, Spectroscopes, a Grinding Machine

IT'S JUST A COMMONPLACE that the fellow who can always have whatever he wants by writing a check for..

134.00 Ex Tax: 134.00

A Mirror Grinding Machine, a Spark Plug Telescope Mount

THE SIXTH Annual Convention of amateur telescope enthusiasts will be held at Stellafane, near Spring..

134.00 Ex Tax: 134.00

Abrasives, with Focus on Diamond Abrasives

UNCOMMON OPTICAL GRINDING and polishing materials such as boron carbide, sapphire dust, titanium oxi..

134.00 Ex Tax: 134.00

Accuracy of the Knife-Edge Test

The first concerns a telescope made by a Benedictine nun, Sister Cornelia of Mount Saint Mary's Conv..

134.00 Ex Tax: 134.00

Aluminizing Equipment, Strain-Testing Glass, Pitch Lap Manufacture

ALUMINIZING one's own telescope mirrors is probably uneconomical, considering the time, materials an..

134.00 Ex Tax: 134.00

Aluminizing Mirrors, Some Knife-Edge Test Devices

LAST MONTH in this department Professor Henry L. Yeagley, of the Department of Physics at the Pennsy..

134.00 Ex Tax: 134.00

Amateur Telescopes, Mirror Grinding Tips, Schupmann Telescopes

BICYCLES having now become once more fashionable, the city or town owner of a richest-field telescop..

134.00 Ex Tax: 134.00

An Ambitious Observatory Is Built By Father and Son

A FEW WEEKS ago one of the largest and most carefully made amateur astronomical observatories went i..

134.00 Ex Tax: 134.00

An Evaporation Chamber, Designing Barlow Lenses, Metal Mirrors, Sources of Rouge

HERE IS interesting news. Aluminizing brought one step nearer reach of the average amateur and at le..

134.00 Ex Tax: 134.00

Another Automatic Mirror Grinder

AMATEUR telescope makers and astronomers within a radius of one light-year of Stellafane, near Sprin..

134.00 Ex Tax: 134.00

Another Grinding - Polishing Machine

IN THIS DEPARTMENT in the October and November numbers Patrick A. Driscoll described the design and ..

134.00 Ex Tax: 134.00

Another Method of Making Mirrors

WHICH OPTICAL SHOP methods are best-professional or amateur?Neither. In each the needs are different..

134.00 Ex Tax: 134.00

Ready-to-use long-term nutrient substrate mixture for new aquariumsDoes not require mixing with grav..
750.75
Ex Tax: 750.75
All natural premium planting media for aquarium plantsBenefits:    Made of 100% pure ..
771.22
Ex Tax: 771.22
Use to measure pH changes in marine aquariums, aquariums with African cichlids, and very alkaline ..
613.60
Ex Tax: 613.60
FRESHWATER MASTER TEST KITMeasures the most important aquarium levels quickly and accuratelyBenefits..
2,914.60
Ex Tax: 2,914.60
GH & KH TEST KITThis test kit includes everything you need to measure the general and carbonate ..
1,012.44
Ex Tax: 1,012.44
6-fold test strips for quick water testing50 test strips.NEW: With a chlorine test (disinfectant in ..
1,303.90
Ex Tax: 1,303.90
Submersible spot lightMulti seal design, fully submersible, 180。Angle regulation.Eeasy maintenance.M..
1,559.25
Ex Tax: 1,559.25
The key to superior adsorption is the maximized surface area found on each granule and pellet of act..
78.00
Ex Tax: 78.00
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