Description: MINT Vintage BioMate Biorythm Calculator, RARE: COMPLETE BIOCYCLE KIT! Rarely does the COMPLETE kit surface, especially w/ blank worksheets! Includes: Biorhtym (geared) Calculator Red Cloth Bag Pile of Blank 28 day cycle sheets Plastic Cycle template Instruction Manual(s) “The Biorhythm theory posited three temporal cycles of different lengths governing people’s lives: a Physical cycle of 23 days, an Emotional cycle of 28 days and an Intellectual cycle of 33 days, which all start off together at the moment of birth and continue with total precision until death. Click photo to enlarge The idea was that as these cycles waxed and waned, the individual’s likelihood of faring well or otherwise in each domain was affected; and when a cycle crossed the zero line, one had better beware! Those “critical days” were prone to accidents and mishaps. Bogus or not, many people in the 20th century believed the theory, and they needed a way to figure how their three rhythms changed from day to day. The math is trivial; you need to compute three sinusoidal functions of your age in days... but then, one can conjecture that people capable of trigonometry would be unlikely to put faith in biorhythm in the first place. So for those who did have faith, various tools were produced. Late in the century these were simple computer programs, and such are still available today; but before the PC made computing ubiquitous, people used mechanical sliderule-like devices for this function. I have three different types in my collection, and they have a strange beauty all their own. Each calculator uses a different configuration to do so, but all have the same elements to allow checking one’s rhythm state: three scales marked with the three cycles and a scale for the days of the year, a system to set these up in the right relationship to each other in accordance with the user’s birth date (using tables provided on the back of the instrument), and a cursor that when set to a given date shows the values of the three cycles on their respective scales. The Bio-Slide Biorhythmic Slide Rule seen above is the simplest in concept. Its instruction sheet originally stated its source as International Marketing Services of Santa Monica, CA, but this was crossed out and a sticker updates it to C.E.I., Inc., also in California. It has three transparent sliding scales showing the three curves for the whole year, and a fixed frame bearing the dates. Once you fix the scales to represent your personal starting point, you can use the sliding cursor to see how your cycles line up for any date in the year. The Biomate, which is made in Japan, is more sophisticated. It uses non-concentric circular scales geared to rotate at the required different rates when you turn the wheel at its bottom edge; this makes for a compact and durable instrument. Setting the initial configuration is done by pulling the wheel downward a bit to disengage the gearing, allowing the cycle and date wheels to be rotated freely to the desired relationship. This calculator does not show the full sinusoidal curve for the year; its wheels show only 2 or 3 sine cycles that repeat when they turn.” These (this) come(s) from a smoke-free home, and have (has) been stored in a temperature & humidity controlled environment at all times The small print: Please scrutinize photos to evaluate the items’ condition. I try to capture any known flaws & give an accurate reflection of my listings' true condition; but feel completely free to message me to ask enough questions &/or additional photos, so that you feel confident in your purchase. Any handling fee is for extra insurance, since eBay has never made that option available to sellers, while also considering eBay items FOB destination; &/or the cost of more protective packaging for delicate objects: I package your purchase the same way I would package if I were shipping something I treasured to myself. . . Since I've been burned too many times by buyers using & returning items damaged, I no longer offer returns unless damaged by the carrier. If the delivery box shows damage, please photograph all damage BEFORE opening, otherwise my claim for against the carrier is null, and, in such circumstances, I shall not pay refunds. Also, all items are FOB destination, meaning that after carrier leaves item at the DEL address, it
Price: 14.95 USD
Location: Lansing, Michigan
End Time: 2024-12-23T23:04:42.000Z
Shipping Cost: N/A USD
Product Images
Item Specifics
All returns accepted: ReturnsNotAccepted
Brand: Biomate
Country/Region of Manufacture: Japan
Vintage: Yes
