1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164 
Passing Comments
Page 72
Page 73
If you've noticed an error in this article please click here to report it so we can fix it.
Street Over Street itiTucH interest has been and Road Over IVIaroused in Fulham and
Railway elsewhere by our article, pub lished last week, dealing with a scheme for building over a railway a section of an arterial road to form a part of the Great West Road. There can be little doubt that the .success of such a construction would lead the way to other important developments no more fantastic than the doubledecker streets suggested by some traffic experts.
Is this a N e w WE have been threatened— Move to Prevent vv and by a London bus Criticism? . . . . driver. As a class he is usually
courteous and considerate, and we have often sung his praises, but having occasion to remonstrate with one on a No. 38, who deliberately ignored our signal to stop, we were told that if we reported the incident "he would have us up for defamation of character"—as if editors were not used to such risks!
A Valentine which L'MPLOYEES throughout the will Certainly be "world of the Chrysler and Welcomed . . . . Dodge concerns are to receive, on February. 14, a valentine in a very practical form. Mr. Walter P. Chrysler is giving a personal gift, to all with over six months' service, of an extra week's salary plus a bonus for each year of service. This will cost him E460000 and will mark the companies' biggest year.
Tactical Objections A LTHOUGH many local Against the Severn r-kauthorities are presenting Road Bridge petitions to'Parliament against the River Severn Road Bridge Bill, it is not, as might be thought, because they all intend to oppose it, but because only by the presentation of a, petition may a local authority be represented at the examination of the Bill by the Parliamentary Committee. Cardiff City Council has, for instance, petitioned against it, but only with a view to being in a position to offer suggestions if necessary.
An Interesting Testing Apparatus for Drivers
AT Aidwych House, the National Institute of Industrial Psychology has equipped a miniature landscape to give a realistic illusion of movement and to reproduce actual motoring conditions with great accuracy. The " driver " can go where he wishes, down a lane, or along a high road, at any required speed, and can, in a realistic manner, park his vehicle or run it on to a grass verge, or even into a pond. His track is traced on a graph which records his speed and behaviour at corners, cross-roads and when passing. The results Strikingly indicate the driver's ability.
Frost Hastens Wear A LTHOUGH interference
of Trolley bus Collector luith trolleybus services due Rollers to frost and ice is an infre quent occurrence, the result of these conditions has a marked effect on the life of the overhead collector rollers. The formation of hoar frost and ice en the overhead lines causes the collector roller on the trolley arm to slip instead of turn, thus excessive wear is occasioned. In some cases the life of the roller has been known to be under 40 miles in such circumstances. It is fortunate that, generally, it is only the first few services that meet with these conditions.
WHILST many clever engineers frequently employ broaching for cutting keyways, internal splines and irregularly shaped holes, its advantages in preference to reaming as a finish for circular holes are not so well known. The process is usually more economical, faster and gives a superior finish. A disadvantage of reamers is that their cutting edges are at right angles to the flow of metal, which may give rise to chattering and tearing of the surface, especially in non-ferrous alloys.
Is Broaching Circular Holes Preferable to Reaming ?
Petrol and Oil EnVACUUM for brake operagines as Efficient V lion is commonly provided Vacuum Pumps. . . by engine suction, and this
arrangement works in a highly satisfactory manner. With a compression ratio of some. 5 to 1, however, a petrol power -unit is not ideally equipped to raise a high degree of vacuum, although it will partially exhaust air from a cylinder or container very quickly. In the case of the oil engine, with much higher compression the position is different, yet through other circumstances the practice of employing a separate exhauster on the more efficient pumping unit is more general. Is it possible that the position may eventually be reversed?