The Audubon Societies ^g 



•r-\anc. 

 [lol-rooni, lor rt'cords of lenipir- 

 )l' the wind. A U\r<s,v shrv\ of 

 manila i)ai)er will answer, dixicU'd into S(|uares eorrespondin,!,^ to the number 

 of days in ihi' month. I'.nter tlu' daily records in one s(|uare, usin<^ colored 

 pencils to distin<^uish the three records taken. 



c. Divide the i)upils into s<|uads, whose dut}' it shall he to make wt'ather 

 observations and to till in the records day by day. 



TlIK ISUTIIKRM OF Sl'RlNC. 



</. Correlate observations on the weather with a simple study of the 

 advance of spring, following the isotherm of 35° F. from the Gulf States to 

 Alaska, using the accompanying map. 



b. Hang uj) a plain manila chart, on which is sketched the outline of Xorth 

 •America with the divisions of the United States and British America, using 

 a colored pencil to trace the courses of the principal mountain ranges and larg- 

 est ri\-ers. On the following dates, Jan. 15, Feb. 15, Mar. 15, Apl. 15, May 15 

 and June 15, draw in the isotherm of 35°F. according to its average position at 

 those times, letting the pu])ils see how different in latitude, |)laces of e(|ual 

 temperature are likely to be. 



c Keep a large colored map of X( rth America on the wall beside the 

 isothermal chart and the weather-rec(.)rd. As the pupils learn different geo- 

 graphical places, let them observe whether spring is likely to reach these- 

 places early or late, as compared with the locality of their home-town or city. 



d. Procure a weather-map' from the U. S. Weather Bureau, Washing- 

 ton, D. C, and compare the pictures of the weather made by isobars with 

 ihose made by isotherms. Without attempting to explain in detail isobaric 

 lines, point out the most conspicuous areas of high and low pressure, stating 

 that, by a careful study of isobars and isotherms, it is possible to predict what 

 the weather is likely to be. 



Xature. 



(7. Find out what |)lants and trees will blossom when the temperature is 

 35° F., and also what insects and animals will be acti\"e at this time. 



b. Follow the northward migration of the Robin as given on the accom- 

 panying map. Between what dates does it travel the fastest, and why? 



c. Keep a record of the earliest arrivals of migrating birds, the length of 

 their stay in your neighborhood, the birds which come in flocks and those 

 which come singly or in pairs. 



General. 



Ask the ])upils to design and make weather-vanes. Explain in the simplest 

 way the principles of the thermometer and barometer. 



