twelve hour amounts not exceeding a few hundredths of an inch. At the evening observation no rain was falling north of the Connecticut coast. Moderate to brisk northeast to east winds prevailed along the Atlantic coast north of Virginia. At the News Observatory the rainfall was moderate until 4 p. m. and light and intermittent during the remainder of the period under consid- eration. At 4.40 p. m. the lower clouds had evaporated and two layers of alto-stratus were visible. The lower layer was about one and a half miles high, undulated, wavy and in some sections globular. It was mov- ing rapidly from the east. The maximum wind velocity for the day, 40 miles from the east-northeast, occurred at this time though equalled again around 9 p. m. These conditions seem to indicate the existence of a drier stratum of air extending to at least one and a half miles above the surface. Its original descent to the surface must have been gradual, in this vicinity at least, since the surface temperature was practically stationary during the entire period. Any pronounced descent would have resulted, due to adiabatic heating, in at least a moderate rise in temperature. The following table gives the hourly weather conditions on the after noon of April 10th at the News Observatory, elevation 475 feet above the street and 516 feet above sea level. Air Rel. Dew Hourly Wind Hour Temp. Hum. Pt. Precip. Dir. Vel. Bar. Weather o jp % o Ji\ In. mi./hr. In. 1 p. m. 42' 99 42' .04 ENE 30 29.99 Lt. Rain 2 p. m. 42 88 39 .01 ENE 30 29.98 Lt. Rain 3 p. m. 43 84 39 .05 ENE 29 29.97 Lt. Rain 4 p. m. 43 74 35 .03 ENE 28 29.96 Lt. Rain 5 p. m. 43 45 24 .01 ENE 34 29.94 Sprinkling 6 p. m. 43 61 31 T ENE 27 29.93 Sprinkling 7 p. m. 43 65 32 T ENE 21 29.93 Cloudy 8 p. m. 44 60 31 T ENE 27 29.93 Sprinkling 9.15 44 40 22 T ENE 30 29.92 Sprinkling —J. Henry Weber. RAINBOW DURING A SNOWSQUALL Mr. Alpers at Westfield, N. J., observed a rainbow during a heavy snow squall on April 27th. It was visible in the east-southeast from 5.55 p. m. to 6.05 p. m. and extended half way to the zenith. April 27th was a wintry day and the coldest of record for that partic- ular date in New York City. Frequent snow squalls were general in the Greater Metropolitan area that afternoon and early evening. In Man- hattan and the adjacent portion of Long Island snow squalls in the early afternoon gave way near sunset to squalls of rain mixed with snow.— J. H. Weber. APRIL WEATHER ABROAD J. HENRY WEBER, News Observatory, New York, N. Y. The Icelandic Low was fairly well developed during the greater por- tion of April but most particularly during the first half. The North Unauthenticated | Downloaded 09/25/21 03:43 AM UTC.