Vintage Wooden Logarithmic ruler Engineering USSR 1969 Soviet Kiev Ukraine

Description: Vintage Slide Ruler Line Counting Logarithmic one Sided 1969 USSR Soviet. Logarithmic ruler, counting ruler - an analog computing device that allows you to perform several mathematical operations, including multiplying and dividing numbers, raising to a power (most often squared and cube), calculating square and cubic roots, calculating logarithms, potentiating, calculating trigonometric and hyperbolic functions and some other operations. If we divide the calculation into three actions, then using a slide rule you can raise numbers to any real power and extract the root of any real power. Before the advent of pocket calculators, this tool served as an indispensable calculating tool for an engineer. The accuracy of the calculations is about 3 significant digits. Please see the photos and ask questions if necessary. More precise and informative data, see the photos. If necessary, I will make additional photos. Payments: Shipping worldwide (via Internaional AIRMAIL with tracking number) Shipping Time: I ship your orders within 1-2 business days after the payment cleared. In most times item will reach most of the countries within 15 to 25 working days. To some remote areas may take more than 25 working days. Delivery time depends on destination and other factors, it may takes up to 20 working days. If you don't receive the item after 30 days, please contact us, we'll investigate and solve the delivery problem. To some remote areas may take more than 45 days! I * LL ALWAYS COMBINE SHIPPING WHEN POSSIBLE. FEEDBACK: Please do not forget to leave Feedback. The feedback will be left after reception of a feedback from you. If you had a problem with got item, communicate with me before to leave a negative feedback. I will try to solve a problem. Your positive feedback is very important for me.

Price: 14 USD

Location: Dnipro

End Time: 2023-11-12T06:40:10.000Z

Shipping Cost: 12 USD