Early Demonstration Van Der Graaf Generator by Physica Ships Barometer They also republished Martin’s works

They also republished Martin’s works on microscopes and globes

Sadly as is often the case

John Gilbert (II) is most likely to have been responsible for the manufacture of this rare survivor

“Treatise on Meteorological Instruments” with advertising that stated that

Dollond and Troughton instruments during Captain George Vancouver’s expedition to Canada between 1791 – 1795

Early Demonstration Van Der Graaf Generator by Physica Ships Barometer They also republished Martin’s worksFor sale, a rare mid twentieth century Van Der Graaf Generator by Physica This rare and early example is comprised of a Bakelite rectangular base with input to the front for an additional discharge wand and the manufacturer transfer to the front stating Physica. It has a circular handle incorporated to the side with a groove cut out in order to attach the generator to an external motor. Two lucite struts support the upper and lower rollers which hold