Skip to main content
Home first level seperator

The Authentic Nocturnal And Tide Predictor

This is a faithful replica of the nocturnal and tide predictor made by Elizabethan instrument maker Humfrey Cole circa 1570 that resides today in London's British Museum. It was used to determine the time at night, and designed for use with Kochab B--a star of Ursa Minor (i.e. The Little Dipper)--because of its high declination in the night sky. To determine the time, a user aligns Polaris (the current Pole Star) with the central hole in the dial. The alidade is then pointed to Kochab which indicates the hour (based upon the current month and day of the year). It can be used thus for another 12,000 years until Vega becomes the Pole Star. The reverse side of the instrument is a tide predictor which was used to determine the time of high tide from the age of the moon (how many days have passed since the last new moon). Brass-plated zinc/aluminum alloy construction. Includes wooden stand. 4" Diam. x 1/2" W. (12 oz.)

Lifetime Guarantee

The Authentic Nocturnal And Tide Predictor comes with The Hammacher Schlemmer Lifetime Guarantee. Items that we sell are guaranteed for their normal life under standard non-commercial use.

Should any product fail to meet your expectations, we will replace it or refund the cost of the item less shipping and service fees. Returns older than one year will be credited in form of a gift certificate.

Should you have any questions, we are available seven days a week (Monday - Friday 7:30 AM - 9 PM EST and Saturday - Sunday 7:30 AM - 8 PM EST) Please call 1-800-321-1484 to speak with a specialist or email us at customerservice@hammacher.com to receive a response within 24 hours or less.

Item 77289
Price $99.95
We regret that this item is no longer available.

May we recommend:

The 16th Century Nocturnal And Tide Predictor.
Hover and click to magnify, click again to zoom.
The 16th Century Nocturnal And Tide Predictor.
The reverse side of the instrument is a tide predictor which was used to determine the time of high tide from the age of the moon.
Path2Response Pixel