UC-NRLF QC /S 7 OFGIFT fcj.]jU, FORMSCLOUD CIRRUS (MARE'S TAIL) ^Zl.OOOto ft-50,000 CONDOR CIRRO-STRATUS HIMALAVAS" CIRRO-CUMULUS SKY(MACKEREL ) tC.CWv 23.000 6, ALTO-CUMULUS ANDES IV 10,000 to 26,000A. (ACONCAGUA] ALTO-STRATUS 10.000'to 23.000& MONT BLANC III STRATO-CUMULUS MATTERHORN CUMULUS 4,600 taG.OOO&. KITE BOSTON /&_ U.S. CUMULO-NIMBUS (STORM CLOUD) to*,SOO NIMBUS BEN NEVIS CLOUD )(RAHN 3flOOto6,400& I V$ iNOWDON STRATUS 1to A3,500 S PAUL ofFrom PermissionPhotographs by By M" R INWARDS.COL.H.M.SAUNDERS. HINTS TO bservers.flfoeteorological PREPARED UNDER THE DIRECTION OF THE OF THECOUNCIL ROYAL METEOROLOGICAL SOCIETY, BY WILLIAM MARRIOTT, F.R.Met.Soc, ASSISTANT-SECRETARY AND LECTURER. SEVENTH EDITION, REVISED AND ENLARGED. ' TfDNS.I ufrkA VVIT&JLL LONDON: 13 & 14 LONG W.CEDWARD ACRE,STANFORD, 12, CONTENTS. PAGE STATIONS OF THE ROYAL METEOROLOGICAL SOCIETY ... . . .5 INSTRUMENTS REQUIRED TO A STATIONEQUIP ..... 5 BAROMETER. How to be mounted .... 6 of the Fortin and Kew PatternsPrinciple .... 6 Attached,, Thermometer 6 Method of,, reading....... 7 Corrections for Index Error . . . . .8 ?, . . . .Temperature Altitude,, ...... 8 Method of a Table to,, combine the three Corrections 10preparing . ,, Correction for . . . . . .10Gravity ,, 10Management Aneroid .,, . . . . . . . n THERMOMETERS. and Zambra's Maximum .Negretti . . .n Maximum .,, . . . . .11Phillips' 5 Minimum . . . . . . .12 and Wet-bulb . . . .Dry-bulb How to mount the Wet-bulb . . . .,, .