Lights That Changed Advertising

The neon sign is an evolution of the earlier Geissler tube, which is an electrified glass tube containing a “rarefied” gas (the gas pressure in the tube is well below atmospheric pressure). When a voltage is applied to electrodes inserted through the glass, an electrical glow discharge results. Geissler tubes were quite popular in the Read more

Meaning Behind Modern Day Tattoos

The Oxford English Dictionary gives the etymology of tattoo as, “In 18th c. tattaow, tattow. From Polynesian tatau. In Tahitian, tatu.” The word tatau was introduced as a loan word into English; its spelling was changed over time from the “tattow” seen in late 18th century writing to the modern “tattoo” and its pronunciation was Read more

Best Photography Apps

Photography is the result of combining several technical discoveries. Long before the first photographs were made, Chinese philosopher Mo Di and Greek mathematicians Aristotle and Euclid described a pinhole camera in the 5th and 4th centuries BCE. In the 6th century CE, Byzantine mathematician Anthemius of Tralles used a type of camera obscura in his Read more