48 MANUAL OF CURRENT OBSERVATIONS 
126. The beginning of each hour should be indicated on the graph. If this has 
not already been done by the observer, the hour marks must be inserted by the tabu- 
lator, who will determine their position from such time notes as have been recorded. 
Next, apply the scale successively to the different hours of the graph and count the 
number of contact marks in each 12-minute space. These are to be recorded directly 
in the third column of Form 270 and the heading of the column revised to read ““Num- 
ber of contacts.” In the following column note the time interval of 12 minutes and 
also indicate whether the contact ratio of the automatic recorder was 1:10 or 1:50. 
TaBLE 2.—Rating table for Price current meter for 60-second time interval 
Rey. Knots Rey. Knots Rey. Knots Rey. Knots Rev. Knots 
(oe ees oe 0. 04 |} 46___-__- il, OF |) Olle-ss2s2) 2% CO |i) WG. = Pay SX8) MI) ale) = = 6. 69 
Qe eee o SENN fs eee il, O27] Ce seee = Me, (ss |i] WB = = oh Oil HH) Sul@.-2- = 6. 80 
Eee ee Breas OW) |) AGO 22-2 il, OG || @B--==== 2300))||\el3 oss 3. 03 |} 315_____- GMO 
Airs Nes Hal Wi} ayo ee I, OY) |), C4 nesese 7 OY |i| 189 --- — 3. 06 |} 320_____- 7. 02 
Sues wes 2 1G} i] BO a= I, Wi jl) OH == =5= 2. 09 || 140__-__- 8. 08 |} 325_-____ 7.13 
Geese Ssee GSI) Gil se il, 183 |] @@G2-2-=s= 22 || WA S10) jj) ee. 7. 24 
(Gee Sams UG) G22 se =e Wy US | Cs se 2, 4 |) 142__222-) 3. 12 |) 8352-___ 7. 35 
Ssae ene oe OS 3 ae is We) OSs ea2 se) 2b AG HI) alee} | 3, 14 ||) 3402" =" == 7. 46 
ONE eae 2) || Gt = -|| il, IM) |) CQsssaee= 2.18 || 144______ 3. 17 || 345______ 7. 57 
LOGS. Bes os Ii) Bigs eo Sos 1. 22 || 100-_---- 2. 20 || 145__-___ 3. 19 || 350______ 7. 68 
illers ees AAG) || H@o22--== 1. 24 |) 1or---_-- 2. 22 || 146______ 8. 21 || 355______ 7. 79 
abate Spee 4S) |i) BU sao-==- Th, AS) Il} WO2B.-s--=| 2 BS |i) idle =e 3. 23 || 360___-_- 7. 90 
Sse See a) |i) B= 2-—- — HEE 23 |e 3 Meee Be AY | eh = 8. 25 || 365______ 8. O1 
1 eee GY i) HVo=.--—= 1. 30 || 104__-_-- 2p Xe) |W] Wa) = = 3, 28) || (Ol === 8. 12 
Nowe ee ave til Gp. -= = 1. 33 || 105__---- 2. 31 || 150__-__- 3. 30 || 375-_-___ 8. 22 
NG e aes B¢ |) Gil--=-== 1. 35 || 106_-----|. 2. 83 || 155______ 3. 41 || 380__-__- 8. 33 
Ili fee ee OO |KO 2a i, Be |i) lO7v---===)- 2% BS |) 1@O_---=- 3. 52 |) 385_____- 8. 44 
IS paar ere Al ll) Goo sa2 il, GY) |} WO. = Ss 2. 38 || 165_-----| 3. 63 || 390______ 8. 55 
ile ae ABZy ||| G42 22-==— IL, Zot |}, W@@s2=-S=1) - 2 40) |) WO 2 s= 38. 74 || 395__-__- 8. 66 
202222252 AG) II) Oj. - == 1. 44 || 110__-_-- 2 a WI Wo = = 3. 84 || 400__--_- 8. 77 
PAN ee ene aif WI Woo 52" Tl, 4H), Wb === Mm, AY IW GO 22 a= 3.95 || 405_--___ 8. 88 
Dien tae a 0) )) @¥sse---=) U, 4S i) Wie == == 2. 46° |) 185--- == — 4.06 || 410______ 8. 99 
23hoes52 8 2) Il) Ges s==-|) Wl, GO ji) Wil} ---- = 2. 49 |) 190 =|) (45 17 ||| (Alo Ss oaks 9. 10 
DHS te Sra ye Ii] Ge 22 =— i, GY |i} Wilél 2-25) 2 Hil i) WH = 4, 28 || 420_____- 9, 21 
2 earea= 3 |} @@se---e=| Il, G4 || WilH--2-== 2. 53 || 200_----- 4, 39 || 425______ 9. 32 
AD Sees 5 HS} ||) Glo -s4<= il, BY |) WG-2 -<= 2. 55 || 205_--_-- 4, 50 || 480_____- 9. 43 
Di ee et > (HO) lI] WH =25- i, GY) |) Wile) B BY |i) BilO2-- === 4.61 || 4385-_——_- 9. 54 
23 ee o OS |i) 7Bo2---==|] iW, Ou ji} Wilks... .== 7 (60) || MilG_= === 4,72 || 440___-__ 9. 65 
2 OM eae ae 5 Gy |) éte-=s---|) I, Gs} jj] Wi@o--.=- 2:62) 220222-—— 4, 83 || 445______ 9. 76 
Bee ese 680 |) WBse-5=5- 1. 65 || 120--__-- 2,040 \5220e eee 4,94 || 450______ 9. 87 
Giles 5 OY) I) 7G--2--=-|| iL, @} || Wail__--== 2. 66) ||| 230222 =—— 5. 05 
Soe ee SCN, Pee =—|) I, AD |i) 128.22 --- 2. 68 || 2352222 = 5. 16 
SpeEoee ae 6 US || Wo- === eel] Il, (2 I WB 2 Beil I) Oe. 22 5. 27 
oy eae UB || @essa=s=|) 1 Ge ||| WA =a 9, I) PBB = 5. 38 
Bones 2a= 6 US I) SOs2-es== Is 7 |) Wado) 7S) MI) PRO = 5. 49 
B68 52 Sous 2 0) ff] Sile_ = = i, 7) |) WaO_ = == LUE N| OG. eae 5. 60 
Silas oes of lll SA ssa IL Bil i) WA a 2: 79))|| 2602 == == 5. 71 
BOuae See = pete ||) Geena ==) il, SS jl) WAS 2 SP GB || A = a 5. 82 
OO eee od |i) Sb oe esse!) i, Ge) |) Wa@)= === 2084, | 20022 = == 5. 92 
AQ Se ae » &8).l] Gbz-se- ea IL 87 | THO.==---|| 2 SH |i) B7@----=- 6. 03 
Bie ae 2 o Oil) G22 2-3 US GO) fy) We == 2. 88 || 280_----- 6. 14 
AD ae > 98) SW2=-=- =|) - Ih, CL) If WSR a == 29 0N |e 280 eee 6. 25 
Aare soe 5 OH | Gs.--2- Selle de RHE lees 32 see 2h, Y) \I PANY) = 6. 36 
ee > Oe |] BW. -=- So) A Gash tee ee = 2 OB) ||| A= == === 6. 47 
ADE eee oe il; OO) |) C2 = == =| Ms BS} ji} exh---- == 2. 97 || 800_2--_- 6. 58 
