Iroquois LonghouseIroquois longhouses were found in the area that is now the state of New York. Alonghouse had a framework built of posts and poles and was covered with sheets of bark.Different types of trees were used in various parts of the building.A strong stiff treewould be used for the outer posts.roquois LonghouseIroquois longhouses were found in the area that is now the state of New York. Alonghouse had a framework built of posts and poles and was covered with sheets of bark.Different types of trees were used in various parts of the building. A strong stiff treewould be used for the outer posts.
Evidence suggests that the magnetic compass was invented in China between 221 and 206 B.C. The earliest compasses were not used for navigation, but for fortune-telling. Chinese compasses became navigational orienteering devices between 1040 and 1044 A.D. and were used as maritime navigational devices by 1117 A.D.
The compass was invented in China during the Han Dynasty between the 2nd century BC and 1st century AD. The magnetic compass was not, at first, used for navigation, but for geomancy and fortune-telling by the Chinese.his is an approximation of a milli-radian (6283 per circle), in which the compass dial is spaced into 6400 units or mils for additional precision when measuring angles, laying artillery, etc. The value to the military is that one angular mil subtends approximately one metre at a distance of one kilometer.