Solid Brass Sundial and Compass in Hardwood BOX – Polished brass sundial compass

Features

• Solid Brass Sundial and Compass in Hardwood BOX - Pocket sundial compass
• Size: 7.5cm diameter X 3cm (Compass); 10cm X 10cm X 4.5cm (BOX)
• Made of Solid Brass: In working oder can be use for basic observation
• with Rose Wood Case (new design hard wood box)
• Royal Mail 1st class Post: Return accepted

Product Details

• ASIN: B009PAGJRO
• Item model number:
• Average Customer Review: Customer Reviews

Product Description

Instructions for Using Simple Pocket Sundial Any sundial of this type requires the following: 1) A steady horizontal base on which to stand it. 2) Conditions when the sun is shining directly onto it - a bright day with hazy sunshine i.e. sun shining through cloud - will not work. 3) A knowledge of your latitude (you can get this from a map of your area, but don't worry about this too much, the nearest degree will do. Then:- 4) Having found your latitude you will now need to adjust the gnomon (the hinged "needle") so that this (latitude) value corresponds to the angle between it and the brass base. The easiest way to do this is to use a schoolboy protractor to make a cardboard template having this angle. 5)Set the sundial so that it is orientated with the "12" marking (near the "knob") pointing due north. 6) The shadow of the gnomon will indicate the time on the dial or chapter ring. For such a tiny instrument you will find that it gives surprisingly good results N.B. It will always show GMT and will therefore appear to be one hour slow during the summer months when the clocks are put forward. One last point: the brass base is quite reflective - don't confuse the reflection of the gnomon with its shadow!