R
Short entries beginning with R that only one encyclopedia carries are gathered on page 1 page 2 page 3 page 4 page 5 page 6 page 7 page 8 page 9 page 10 page 11 page 12 page 13 page 14 page 15 page 16 page 17 page 18 page 19 page 20 page 21 page 22 page 23 page 24 page 25 page 26 page 27 page 28 page 29 page 30 page 31 page 32 page 33 page 34 page 35 page 36 page 37 page 38 page 39 page 40 page 41 page 42 page 43 page 44 page 45 page 46 page 47 page 48 page 49 page 50 page 51 page 52 page 53 page 54 page 55 page 56 page 57 page 58 page 59 page 60 page 61 page 62 page 63 page 64 page 65 page 66.
- Rabbit 2 sources
- Rabelais 2 sources
- Rabies
- Raccoon 2 sources
- Rachel
- Racine
- Racine, Jean Baptiste
- Rack 2 sources
- Racquets
- Radioactivity
- Radium 2 sources
- Radium Therapy
- Ragusa
- Rail 2 sources
- Railroad
- Railway Brotherhoods
- Rain
- Rainbird
- Rainbow
- Rakshasa
- Raleigh
- Raleigh, Sir Walter
- Ramadan
- Rameau
- Rameses II
- Ramming
- Ramsay
- Ramsay, Allan
- Ramsgate
- Randolph
- Rangoon 2 sources
- Rank 2 sources
- Ranke
- Raphael
- Raphael, Sanzio
- Rapp
- Rasp 2 sources
- Rasputin
- Rat
- Rat
- Ratio
- Rationalism
- Ratisbon 2 sources
- Rattan 2 sources
- Rattlesnake 2 sources
- Raven 2 sources
- Ravenna 2 sources
- Rawlinson
- Ray
- Raymond
- Read
- Reade 2 sources
- Reading
- Real Estate
- Realism
- Realism in Fiction
- Reaping
- Reason
- Reaumur 2 sources
- Rebus 2 sources
- Recall 2 sources
- Reciprocity
- Reconstruction
- Record
- Red Cross 2 sources
- Red Jacket
- Red Pigs
- Red River 2 sources
- Red Sea 2 sources
- Reduction of Metals
- Reed
- Reed, Thomas Brackett
- Reel
- Referendum
- Refining Metals
- Reflection
- Reform Acts
- Reformation, The
- Reformed Church
- Reformed Episcopal Church
- Regeneration
- Registering Gauge
- Regnault
- Regulus 2 sources
- Reichenbach
- Reid
- Reign of Terror, The
- Reindeer 2 sources
- Reithrodon
- Relativity of Knowledge
- Relics
- Relief
- Religion
- Rembrandt 2 sources
- Remington, Frederic
- Remittent Fever
- Remus
- Renaissance 2 sources
- Renan
- Rennie
- Renwick
- Repairing Repeating Watches
- Repairing the Cupola
- Reparations
- Repeating Attachments
- Reporting
- Reproduction
- Reptilia
- Republic 2 sources
- Republican Party 2 sources
- Reservation 2 sources
- Reserve
- Reserve Banks
- Reservoir 2 sources
- Resorcin
- Respiration 2 sources
- Restoration
- Resurrection
- Retort 2 sources
- Reuss
- Revelation
- Revenue Cutter Service
- Reverberatory Furnace 2 sources
- Revere
- Revere, Paul
- Revival
- Revolution 2 sources
- Reward
- Reyes
- Reynolds
- Rhabdomancy
- Rhasis (or Rasi)
- Rhea 3 sources
- Rheims 2 sources
- Rhetoric
- Rheum
- Rheumatism
- Rhine 2 sources
- Rhinoceros 2 sources
- Rhio
- Rhode Island 2 sources
- Rhodes 2 sources
- Rhodes Scholarships
- Rhodes, Cecil John
- Rhodesia
- Rhododendron 2 sources
- Rhondda
- Rhone
- Rhus
- Ribbon
- Rice 2 sources
- Rich
- Richard of Cornwall
- Richards
- Richardson 2 sources
- Richelieu 2 sources
- Richmond 2 sources
- Richter
- Richter, Jean Paul Friedrich
- Riddles 2 sources
- Rie Isidore
- Rienzi 2 sources
- Rifle 2 sources
- Riga 2 sources
- Right of Way
- Rigi 2 sources
- Rimini
- Ring 2 sources
- Ring
- Ring Money
- Rio De Janeiro 2 sources
- Rio Grande 2 sources
- Riot
- Ripley
- Ripley, George
- Ripon
- Ritschl
- Rittenhouse, David
- Ritter, Karl
- Ritualism
- Rivas
- River
- Rives
- Rizal
- Roach
- Road
- Roads
- Rob Roy
- Robert
- Robert College
- Roberts
- Robertson
- Robespierre
- Robin 2 sources
- Robin Hood 2 sources
- Robins
- Robinson
- Rochelle 2 sources
- Rochester 2 sources
- Rochester Rappings
- Rock 3 sources
- Rockefeller 2 sources
- Rockefeller Foundation
- Rocket
- Rocky Mountains 2 sources
- Rodgers
- Rodney
- Roe
- Roebling
- Roentgen
- Rogation Days
- Rogers
- Rohan
- Rohlfs
- Roland 2 sources
- Rold
- Rolled Glass
- Roller
- Rolph
- Roman Catholic Church
- Romance Languages
- Romanticism
- Rome 3 sources
- Romney
- Romola
- Romulus 3 sources
- Roosevelt
- Roosevelt, Theodore
- Root
- Root (Anatomy that part of any organ)
- Rope 3 sources
- Rosa
- Rosary
- Rose 3 sources
- Rose Engine
- Rosebery
- Rosecrans
- Rosenwald
- Roses
- Rosetta Stone 2 sources
- Rosewood 2 sources
- Rosicrucians 2 sources
- Rosin-cores
- Ross
- Rosse Telescope
- Rossetti 2 sources
- Rossetti, Dante Gabriel 2 sources
- Rossini
- Rotation
- Rotation
- Rothschild 2 sources
- Rotterdam 2 sources
- Rouen 2 sources
- Roulette 2 sources
- Round Table, The
- Rousseau
- Rousseau, Jean Jacques
- Rowan
- Rowe
- Rowing
- Royal E
- Royal Society
- Royer-Collard
- Rubber 3 sources
- Rubens
- Rubinstein
- Ruby 3 sources
- Rudini
- Rug
- Rugby 2 sources
- Ruhr District
- Rum 2 sources
- Rumania 2 sources
- Rumford 2 sources
- Ruminants
- Rupee 2 sources
- Rural Credit
- Rush
- Ruskin
- Ruskin, John
- Russell
- Russell of Killowen
- Russell Sage Foundation
- Russia 2 sources
- Russia Leather
- Rust 2 sources
- Ruth 2 sources
- Rutherford
- Rutledge
- Ryan
- Rye 2 sources
- Rye House Plot 2 sources
- Rymer