A B737 EXPERIENCES MODERATE TURB RESULTING IN 2 FLT ATTENDANTS BEING INJURED.

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OUR LOCATION WAS 55-65 NM S OF RIC VOR (RICHMOND; VA) DSNDING. I HAD SEATED THE FLT ATTENDANTS TWICE WITHIN THE LAST 15 MINS AS WE ENTERED SOME RAIN (GREEN ONLY ON THE RADAR) DUE TO LACK OF RIDE RPTS. THE RIDE WAS SMOOTH THROUGH THE RAIN AND AS WE BROKE INTO THE CLR; I CALLED THE FLT ATTENDANT'S AND ASKED THEM TO CONTINUE SVC AS NEEDED. APCHING 65 NM S OF RIC; WE ENTERED INTO MORE OF THE SAME RAIN (GREEN ONLY ON THE RADAR). NOTE: THE ACTUAL TSTMS WERE LOCATED ABOUT 40-50 NM NW OF US. OUR RANGE ON THE RADAR WAS BEING WORKED FROM 80 NM; 40 NM; TO 20 NM WITH ELEVATION OF +4 TO -2. WE WERE DSNDING THROUGH FL260 WHEN MODERATE TURB OCCURRED FOR 5-10 SECONDS; THEN CALM AGAIN. THE FO AND I WERE SHOCKED WHEN WE FELT THE FIRST AND CONTINUING BUMPS. THE FO IMMEDIATELY TURNED ON THE RADAR TO 10 NM AND -2 TILT WITH NOTHING BUT GREEN SHOWING ON THE RADAR. I STARTED A TURN TO THE L TO CLR THE RAIN. MY SPD AT THE TIME WAS 270-280 KTS AND 2000 FT SINK RATE. WE BROKE INTO THE CLR ABOUT 30 SECONDS LATER AND I CALLED THE FLT ATTENDANT'S TO CHK ON AND APOLOGIZE FOR THE UNEXPECTED BUMPS. FLT ATTENDANT 'B' HIT HER HEAD ON THE CEILING AND FLT ATTENDANT 'C' WAS HIT IN THE R SHIN BY THE BEER KIT. BOTH WERE SEATED ON THE AFT JUMPSEAT. FLT ATTENDANT 'A' WAS NOT INJURED UP FRONT. FLT ATTENDANT 'B' HAD A STIFF NECK WITH TINGLING IN HER FACE AND PAIN IN HER ARM. FLT ATTENDANT 'C' HAD A 2-3 INCH CUT ON HER R SHIN. FLT ATTENDANT 'A' IMMEDIATELY HEADED TO THE BACK AND DID A WONDERFUL JOB OF ASSISTING THE OTHER FLT ATTENDANT'S; ASSESSING THE SIT; AND INFORMING US. BOTH FLT ATTENDANTS 'B' AND 'C' GOT UP TO HELP; BUT FLT ATTENDANT 'A' INSISTED THEY REMAIN SEATED. SHE APPLIED FIRST AID; THEN SECURED THE CABIN ALONE. NONE OF OUR PAX WERE INJURED. FO NOTIFIED OPS AND ASKED PARAMEDICS AND A FLT OPS SUPVR TO MEET THE ACFT. A PIREP TO CTR WAS ALSO MADE AS WE WERE GIVEN DIRECT TO ZZZ. THE DSCNT AND LNDG WERE UNEVENTFUL AND THE PAX REMAINED SEATED WHILE PARAMEDICS ASSISTED. BOTH FLT ATTENDANT'S WERE TAKEN TO HOSPITAL WHERE THEY WERE TREATED; AFTER A 1 HR WAIT; AND RELEASED.