The San Francisco call., 1908-11-22


but agreeable.
The Fisk rubber company has moved
INTO Its new quarter at 400 Golden
Jne new quarters they have made spe-
clal arrangements to handle their Gus
toners IN more satisfactory way.
europe 70 determine the amount OF
Sip OF the wheel Of an automobile
while being driven at different
speeds. as published exclusively
IN The Call recently, comes the
report of the Investigations of the
Henry Souther, technical expert Of
the mechanical branch Of the associa-
tlon Of licensed automobile manufac
u tire slipping explains that he had
analyzed the figures showing the re-
suits or tests published.
These tests give the number Of revo-
lutons Of each wheel on an automo-
BILE running over a measured course
A nlgh powered car was used on the
Brooklands track in England. A newly
developed instrument made il possible
10 accurately record the number Of re-
Noluuons OF each of the wheels inde-
pendently and for identically the same
period Of time The chief result deter
mined was that the revolutions Of the
rear wheels were greater than the re-
NolutiOns % the front wheels. That is,
the driving wheels would slip.
Not con ent with the mere fact that
they slipped and that the slippage was
greater with greater speed, Southers s
analysis indicates the percentage of
tire slip, and this Immediately becomes
the interesting item
From these results We have now
added TO our knowledge of automobile
operation the fact that on a level
racing track Of the best sort, with
plain round tread tires inflated as is
usual for racing. the percentage of slip
~ r" .ErfrH DC
about O-5 for a speed of 40 miles per
hour, 6 for a speed OF so miles per
hour. IL for a speed of so miles per
hour, is for a speed of 20 miles per
hour; 81 for a speed of so miles per
hour. and 5-4 for a speed Of 80 miles
per hour.
ing wheel on the inside, running
around a curved track. slips very
little more than the outer wheel. This
Is clearly accounted for by the fact
that the centrifugal force going around
curves reduces the weight on the inner
wheel permitting II to slip more read
ily than the outer wheel.
That the automobile Of the present
DAY is a reliable machine and will
stand up 70 its work more than one
season is fOrcibly demonstrated in the
fact now 10 be seen in a new depart
ment Of business. Considerable money
IS TO be invested in the manufacture OF
automobile tops. covers and upholstery.
mobile was in the experimental stage.
very few cars We're renovated. They
We're run until they were fit candidates
Tor the junk pile and then they were
j. A Gillig, in discussing this new
local industry yesterday, said:
one would be surprised to know the
number Of owners who. as the rainy
season approaches. are making ar
rangements TO have their cars over
hauled. painted and new upholstery put
In There seems 10 be no need for a
new car as their present vehicle is
standing the wear and tear perfectly
As TO tops, IL has been found that
those Of local manufacture prove the
most satisfactory. as it Is possible to
ft them perfectly 10 the cars. Among
those who have had tops and dork done
on their machines by Gillig are Charles
S. Wheeler. S. H. Hooper. Henry Lach-
man and DR.. II. J. Schlageter.'
Tony Nichols, chairman Of the con-
test committee Of the san Francisco
motor club. yesterday announced that
he had appointed ". B. Morrill, and
George r. Johnson his co-Workers
on that committee. These two enthusf-
asts are well known in the automobile
trade, Morrill, being connected with the
firm Of j. ". Leavitt company. while
Johnson is the coast representative of
the Fisk rubber company. The way
they handled their departments in the
big "a hours reliability run Of the
automobile dealers association held
this year speaks well Of that may be
expected Of the future contests of the
new club.