1 Air Brake .................. George Westinghouse
2 Aniline Dyes............. Hoffman
3 Antiseptic Surgery...... Lord Joseph Lister
4 Archimedean Screw.. Archimedies
5 Avogadro's Hypothesis.. Avogadro
6 Atomic Number......... Mosley
7 Atomic Theory .......... Dalton
8 Atomic Structure ....... Bohr and Rutherford
9 Automobile ............... Daimler
10 Balloon ..................... Montgolfier
11 Barometer................ Torricelli
12 Beri - Beri................. Eijkman
13 Bicycle....................... Macmillian
14 Blood Circulation ....... Harvey
15 Boson....................... S.N.Bose
16 Boyle's law ..................... Boyle
17 Braille ............................ Louis Braille
18 Breaking up the Nucleus of an atom Rutherford
19 Celluloid ................... Parkes
20 Chloroform .................. James Harrison and James Young Simpson
21 Cholera Bacillus............... Robert Koch
22 Cinematography ............. Thomas Alva Edison
23 Coloured Photography Lippman
24 Cosmic Rays.............. R.A.Millikan
25 Crescograph ......................J.C.Bose
26 Crystal Dynamics ......... C.V.Raman
27 Cyclotron......................... Lawrence
28 D.D.T. ......................... Dr.Paul Muller
29 Deuterium (Heavy Water) H.C.Urey
30 Diesel Oil Engine ..............Rudolf Diesel
31 Discovery of North Pole Robert Peary (1909)
32 Discovery of South Pole Amundson (1912)
33 Discovery of West Indies Columbus (1492)
34 Discovery of Solar System Copernicus (1540)
35 Discovery of Laws of Planetary Motion Kepler
36 Discovery of Specific Gravity Archimedes
37 Drinker's Chamber of Iron Lung Dr.Philip Drinker
38 Dynamite .................. Alfred Nobel
39 Dynamo .......................... Faraday
40 Dynamical theory of Heat Lord Kelvin
41 Deciphering the genetic code Dr.Hargobiad Khorana
42 Discovery of Electrons J.J.Thomson
43 Electric Battery .......... Volta
44 Electric Lamp................. Edison
45 Electricity...................... Faraday
46 Electron Theory .................Bohr
47 Electromagnetic Theory Maxwell
48 Electrical Waves ............. Heitz
49 Electric Measurement Gauss
50 Effect of Pressure on trough bodies Meghnad Saha
51 Fahrenheit Scale .......... Fahrenheit
52 Film & Photographic goods Kodak
53 Fundamental Laws of Electric Attraction Coulomb
54 Fountain Pen ................Waterman
55 Geometry ................. Euclid
56 Gun powder .............. Rogei Bacon
57 Gramophone............. Thomas Alva Edison
58 Helicopter.................. Broquett
59 Helium Gas .................. Lockyer
60 Heavy Hydrogen......... Urey
61 Homoeopathy ...................Hahnemann
62 Hovercraft................. Cockrell
63 Hydrogen .................. Cavendish
64 Hydrophobia................ Louis Pasteur
65 Induction of Electric Current Faraday
66 Incandescent Bulb .......... Edison
67 Induction Coil ................ Rohm Korff
68 Insulin........................ F.Banting
69 Intelligence test.......... Binet
70 In Number Theory ...... Ramanujam
71 Jet Propulsion................ Frank Whittle
72 Kala-azar Fever ........... U.N.Brahmachari
73 Laughing Gas ............... Priestley
74 Life Boat ......................... Henry Great Head
75 Lift (Elevators) ........... Otis
76 Lightning Conductor......... Benjamin Franklin
77 Linotype ..................... Mergenthaler
78 Line of demarcation (ship) Plimsoll
79 Laws of Electrical Resistance Ohm
80 Law of Electrolysis....... Faraday
81 Law of gases............ Gay Lussac
82 Laws of Gravitation.... Newton
83 Laws of Heredity ........ Gregory Mandel
84 Logarithms ............... John Napier
85 Laws of Motion............. Newton
86 Laws of Natural Selections Darwin
87 Laws of Multiple Proportion Dalton
88 Liquid Oxygen ............... Dewar
89 Mathematical Astro Physics Chandrasekhar
90 Measurement of Electrical Energy Joule, James Prescoft
91 Mauve dye ................ Perkin
92 Machine Gun ............... Dr.Gatting
93 Malarial Parasite ................Ronald Ross
94 Mechanical Equivalent of Heat Joules
95 Meson................ ...... Hideki Yakawa
96 Microphone ............... Berliner
97 Microscope................ Janes
98 Montessori Method .... Maria Montessori
99 Molecular Scattering of light in fluid Ramanathan
100 Neon Gas .......................Ramsay, Travers
101 Neutron .................... Chadwick
102 Nuclear Fission Otto Hahn, Bohr and Fermi
103 Nylon Plastic .............. Carothers
104 Origin of Species........ Charles Darwin
105 Oxygen...................... Priestly
106 Paints ........................... Shalimar
107 Penicillin .................. Fleming
108 Periodic Law .................... Mendeleef
109 Phonograph ................. Edison
110 Phonographic Shorthand Pitman
111 Photograph..................... Dauguerre
112 Principle for lever (S.P.Gravity) Archimedes
113 Phototherapy ............. N.R.Finsen
114 Positive Electrons .............Anderson
115 Powerloom ............... Cartwright
116 Pneumatic.Tyre............... Dunlop
117 Printing for the Blind ..........Braille
118 Printing Press........... Caxton
119 Printing Types............. John Guttenberg
120 Psycho-analysis ............. Dr.Sigmund Freud
121 Quantum Theory ................Max plank
122 Radio-activity of Uranium Henry Becquerel
123 Raman effect.....................C.V.Raman
124 Radium......................... Madame Curie
125 Railway Engine........... Stephenson
126 Radio transmitter............ Alexanderson
127 Rare Gas .................. Cavandish
128 Replacing human heart Christian Barnard
129 Revolver ..................... Colt
130 Safety Lamp ................... Davy
131 Safety Razor ............... Gillet
132 Salk Vaccine ................ Salk
133 Seismograph .............. Roberts Mallet
134 Scientific astronomy ......... Hippalus
135 Sewing Machine.............. Elias Howe
136 Sextant ...................... Hadley
137 Space flying......................Braun, Dr.Wernher Von
138 Steam boat .................. Fulton
139 Steam Engine............ James Watt
140 Steam Turbine.............. Parsons
141 Spectroscope ........... Bunsen
142 Steel Melting Process Bessemer
143 Stethoscope .................. Laennec
144 Submarine ................. Bushwell
145 Sulpha Drugs ............... Domagk
146 Theory of Relativity........... Einstein
147 Theory of Evolution ............Darwin
148 Theory of conditioned reflex Pavlov
149 Talkies ..................... Lee-de-Frost
150 Tank ............................... Swinton
151 Telegraphic Code............... Samuel Morse
152 Telephone................. Graham Bell
153 Telescope.................. Galileo
154 Television................. Baird
155 Thermometer ................ Galileo
156 Thermos Flasks......... Dewar
157 T.N.T......................... llly Brandt
158 Transistor ................. Shockley
159 Typewriter....................... Sholes
160 Uranium fusion .......... Oho Hahn
161 Uranus (Planet).......... Herschel William
162 Vaccination .............. Jenner
163 Vitamins .......................... Funk
164 Washing Soda................. Lablanc
165 Wireless Communication Oliver Lodge
166 Wireless Telegraphy .... Marcony
167 X - Rays .......................... Roentgen
168 Zip Fastener .................... W.L.Judson