Vintage 1934 Shop Trigonometry Henry Ford Trade School Book Michigan Manual

The Henry Ford trade-school trigonometry book has become the machine shop lesson.  Vintage Shop Trigonometry manual from Henry Ford Trade School, Dearborn Michigan. Copyright 1934, reprinted 1942. Trade-school math reference for shop / machine work applications. Great for Ford history collectors, Henry Ford Trade School interest, machinist reference collectors, vintage technical education, industrial arts collections, shop display, or old math book collections.  Brayden Fumblesnatch picked this up, saw Shop Trigonometry, and became convinced triangles were being sold retail. He asked if Henry Ford invented cosine, checked the machine photo for spark plugs, then wondered if Dearborn Michigan was where angles go to clock in. The manual measured his stupidity in degrees.  I needed to be somewhere else.  So I went straight to Dorsia. I ordered machinist quail over trigonometric shop foam with pickled micrometer onions, smoked Ford trade-school dust, and a tiny sine-table crisp the waiter described as reprinted 1942 but still aggressively calibrated. The waiter nodded once and said, Excellent choice, sir.  I picked this up right before some bozo did.  Shipped right — packed flat and protected, not tossed loose into a box to bang around like a failed machine-shop calculation.  Comes from a smoke-free lair.