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295 results for “free”
Geiger Counter (Professional Grade, Calibrated)
Professional-grade Geiger-Muller counter, recently calibrated. Detects alpha, beta, and gamma radiation. Includes headphones for the characteristic clicking sound. When Pierre and I first heard the clicks from our radium sample, we knew we had something the world had never seen.
Chemistry Lab Fundamentals -- Precision & Safety
Small group (max 4). Proper lab technique: titration, crystallization, fractional precipitation, safe handling of chemicals. I'll teach you the way I learned at the Sorbonne -- hands on, precise, no shortcuts. You will weigh to four decimal places. You will label every beaker. You will keep a proper lab notebook. Sloppiness in a lab kills people. I should know.
Tabletop Printing Press (Working Replica)
Working replica of a 15th-century screw press, scaled to tabletop size. Wooden frame, iron screw, leather ink balls. Comes with a starter set of lead type (Textura blackletter) and oil-based ink. Print your own pages. The same mechanism that ended the Dark Ages, now in your kitchen.
Ink Making Workshop -- Oil-Based, From Scratch
Make your own oil-based printing ink from linseed oil, soot, and pigments. Water-based ink was fine for stamps but terrible for type -- it beaded up on metal. I had to invent a new ink. You'll leave with a jar of ink good enough to print with. Wear old clothes.
Franklin Stove (Cast Iron, Working Replica)
Cast iron replica of the Pennsylvania Fireplace. More efficient than an open fireplace -- the baffle system circulates warm air into the room instead of up the chimney. I refused to patent it. Some things should be free. The Governor of Pennsylvania offered me a patent; I said no. Heat is a public good.
Self-Education Mentoring -- The Bookbinder Path
One-on-one mentoring for anyone without a formal science education who wants to learn. I had no degree, no university, no connections. I had a library and a willingness to work harder than anyone in the room. I will help you build a self-study plan and find your Humphry Davy -- the person who opens the first door.
Desert Navigation & Survival -- Water, Sun, Sand
Finding water in the desert. Reading sun and stars. Building shelter from heat. My army marched from Egypt to Palestine through the Sinai -- if you cannot survive the desert, you cannot fight in it.
Chivalry & Diplomacy Seminar -- The Warrior's Honor
How to wage war without losing your humanity. Prisoner treatment, negotiation under pressure, trust with enemies. I sent Richard ice when he had fever. He sent me horses. We tried to kill each other for three years and parted with respect. Tip: Your reputation arrives before your army.
Castle Design & Fortification Workshop
Concentric walls, flanking towers, murder holes, killing grounds. I designed Chateau Gaillard in Normandy -- three baileys, each commanding the one below. Philip took it by climbing through the latrine chute. Tip: Design for the attack you cannot imagine, not the one you expect.
Lakota Bow & Arrow Set (Sinew-Backed, 20 Arrows)
Short sinew-backed bow, 45-pound draw, optimized for mounted use. Twenty dogwood arrows with iron and flint points. This is what we hunted buffalo with from horseback at full gallop -- one arrow could pass through a buffalo at close range.
Steppe Survival Workshop -- Live Off the Land
Three-day outdoor survival. How the Mongol army traveled without supply lines. Dried meat under the saddle, fermented mare's milk, hunting on the move. Tip: A Mongol rider carries 10 days of food in two saddlebags. Learn to need less.
Mounted Archery Training -- Shoot From the Saddle
Mongol children ride at three, shoot at five. Mounted archery at walk, trot, and canter. Composite recurve, thumb draw, the Parthian shot. Tip: Do not aim. Become the arrow. Your body knows the trajectory.
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