Show oi Of NOW IS KEPT BY I AERIAL SI Observations and Records of Currents Form Part I. I of Every Journey Journy OSTON BOSTON Mass March 3 The S.-The The lo loo log logan o hn an an makes interesting reading air voya voyage o is so nove novel an E me e e. e for the present at least that i it iti i scarcely fail to be crowded with do Ie taps L of absorbing interest At present presente t o e lo logs s arc are lar largely el restricted to r re r- cordin mere scientific e data An ai air ilot t sets down his observations muc much it a mariner keeps tho lo log of his shi ship n ea lt As 8 s air voyages become more common Lse se se logs togs will be he kept more in jn detail I addition to the records of scientific there will be bo comment comments in D the voya voyages es oven even descriptions o of matchless scenery senery nery and anel the lively im im- im ss ons of the trip It will wiD doubtless common to illustrate these logs with viti witha a J. J mini nal photographs here are even een monT scientific ons ons to be set down toWn in fl the lo log o of than in that of a ship at sea modern ba balloonist carries aloft a aris arising rising ris ng variety of scientific is ts Some SOm r of nf f those these instruments work worl a matic and anel their records are arc proS pro pro- S ed intact i 1 I in the tho case of th the Ometer moter Th The indications of of the state stat stat- jpe pe e on the thor other hand band must bo ho se sen set n 0 in rn the lo log at re regular intervals ls e temperature which fluctuates con eon Drably with th the altitude is another detail of tl the lo log lie he photographs of the tho baskets o oge of fe ge balloons show a number of mys mys- lOUt lous boxes and ani dials hun hung on the fhe CS CR above the basket Incidentally set sot of f these instruments instrument About OP In Tn many ninny aerial races race ail hd d it is insisted upon that a corn com lo log containing tho readings from instruments be bo l kept ept from the time until th the landin landing barometric reading for instance tes at a glance tho the course of th the durin during the tho air air vova voyage e sed in in airships airships' is carried in a box with a lass elass front ishun at the side of the theU car car can the pointer which indicates the thees es in altitude i a a. pen is attached h moves over ocr a drum operated by I prk Jork ork At the end of th the voyage coord shows just how the ship has Bed ed or dropped by turn through- through his This rec record rd may bo ho pasted in in the book ook ws Pilots Pilot's Skill his record indicates at a glance th the U. U of the tho sky pilot in in maneuvering IJ craft An All All' amateur aeronaut will ait it difficult to keep hi his ship at the ie e level It Jt experience VU h wind currents and atmospheric editions aloft to take tako advantage of ofie ie jS air air strata and sail along without pp Zib use of ballast The barometric rec a n of an amateurs amateur's voya voyage e is is likely to indicated by bv an exceedingly v varia varia- ria LP line which zigzags continually oss the sheet The 10 log of a skillful pilot using the phrase in its mod mod- ense will show a barometric line Iti n. n l few if any abrupt movements ier- ier up or down dawn while the general ement ent will be full of Ion long graceful kle ie e indicates a change in h of the car almost to the The barometer is of course much sensitive The sky pilot keeps his upon the indicator of the thc stati- stati pe much as the man at the wheel of Ipe Seagoing ship shin watches his compass mla I the he car rise rise or fall five or ten t- t it cans t that it is being knocked it its its course and this must roust be met Wc by ier by or by throwing out ballast to give force fco or by l by y a skillful idling o of tho v valves e d to t. brin bring it down Vatch the tho rom the car of an airship especially altitudes it is impossible to tell om II-om ten m one ones one's a sensation If it the car be falling failing IsIng so that the is J Inval- Inval I tanie Ie Any change In the nature of t li t iK 1 is thus thu first by this pointer The IM speed with the car rises s or f falls lt lIs-lt It ma may be te F lIe a minute rU itt at times times may may be I from this instrument I erial logs so O ar ar have hav only been kept pring regular g the tho aeroplane balloon n or om I j journeys dirigible g will flights hS be in this way within a 11 few years at t at present this If refinement of If travel h aft i n not been reached The Journey of a WWW or any ras as night flight In fact is jore re deliberate and the aeronaut has 1 ipe time to look 1001 about about- hIm n. The mo- mo moI I of the tho car In a arias as flight light again is fo so find and fr free roe from vibration that one a aft write up the log lag from time to time t perfect ease case nee nCe the time air all craft travels with the tho nd often orten holding tIm th tho sum sum-j course for fori or ours i at a titTle the compass makes lit- lit rouble for the man keeping the log loA an b but an r on entire intire 01 ot t tw voyage hM f-hM i will o bo be ii h haq made i U u.- u. lie temperature on th the other haul han a es much more mom o oe e widely than on land lando As the She ships ship rise or tall fall through new o all air str the thermometer I Idy y Informs 1 ie he pUnt Plot of ot time till fact act 6 readings readIng are aro moro more important than t land might Imagine If Changes ule sufficiently to f gas bag expand o or contract Its ower ls iii J g r n I affected r I and ow te must t he 0 met mot hy throwing t or letting out gas There re U ii lb COre or of such changes in a sin In- sinthe ut the record of r pHe ig v v be t unable naje to io to ac- ac tJ of ballast 1 r v gas as the received NI I 00 at t time 1 io recalls ch F wea II lm h. h iary servos tl to n II 11 m t roll oll of h pa naturally eold I n S 3 lany oth other wr r air all pr craft aloft I character If IC It can Clan be bo bea bea a a young na such ships willand will I pla phav anti and enough h t ii permit of sig- sig I ud picked t let brief C by 11 U lcd ws as bad form in iii sU aeron-sU- no nf air ait- aft ci-aft to trail talt anI an- an I rL 1 of ct cour course P. P the is it have hiti to follow it bY I until thc lucky cur cur- curI I i-i i ELP CLEd An aeronaut who I lug tiei an air curI cur cur- I- I E air lane laie Is 3 G G. G Paul PattI city city- i an airship shows n persistently fol- fol folI I 1 about accepted as proof Dean uJ j the violated one of I It fj cairns il tO W I fi t i details r n.-r of 10 ru at-ru ith rii of the earth SS These SS I pe the tho ya aro much more I j is imagined The I peculiar and it la 1st if HI peoples a mire milci ay as J fl 62 ea effort An aira air air- a of al will e Ill along 1055 than I. I will twill often be in with I time |