An improved educational appliance

摘要

979, 358. Teaching weather observation. JAMES GALT & CO. Ltd. Dec. 23, 1963 [Dec. 27, 1962], No. 48606/62. Heading G5G. An educational device for use in teaching weather observation comprises (1) a chart 1 having areas thereon denoting factors contributing to weather conditions and including one area marked off to indicate times of the day (2) marked elements for placing on the chart to indicate conditions at a particular time and (3) a book withprinted areas corresponding to those on the chart whereby a written record maybe kept. The chart 1 has a printed strip 4 with a number of representations 5 of the sun below each of which is an indication of the hour of the day. A marker placed on one of the representations indicates the time at which observations are taken. The chart also has a representation 8 of a thermometer upon which a marker 9 can be placed, and form circular areas 10... 13 divided into sectors in which markers can be placed to indicate respectively rain conditions, wind conditions, storm or tempest conditions, and wind direction. Near the bottom of the chart are areas 7 illustrating possible cloud formations, and above these areas is a scale 14 of barometer pressure upon which a marker can be placed. A separate sheet with printed areas representing cloud formations corresponding to those at 7 is provided, and this sheet can be cut up so that at each observation, a cut-out piece can be placed over that one of the suns 5 corresponding to the time of observation to indicate the cloud formation at that time. In one form, the chart 1 comprises a printed metal sheet 1 attached to a fibre board backing 2, and the markers placed on the areas 7, 8, 10... 13 are small magnets. The separate sheets containing illustrations of cloud formation is formed of rubber sheeting containing magnetized metal particles. According to modifications, the markers may have pins fitting into holes in the charts, or the chart and markers may be of a synthetic material e.g. polyvinyl chloride, so that a marker is held in a set position by atmospheric pressure.